diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..216d142
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,9 @@
+module.exports = {
+  root: true,
+
+  extends: ['eslint:recommended', 'plugin:unicorn/recommended', 'prettier'],
+
+  rules: {
+    'unicorn/no-reduce': ['off'],
+  },
+};
diff --git a/jest.config.js b/jest.config.js
new file mode 100644
index 0000000..d563552
--- /dev/null
+++ b/jest.config.js
@@ -0,0 +1,9 @@
+const jestCommon = require('./test/config/jest.common');
+const lintProject = require('./test/config/jest.lint');
+const unitTestProject = require('./test/config/jest.unit');
+
+module.exports = {
+  ...jestCommon,
+
+  projects: [unitTestProject, lintProject],
+};
diff --git a/lib/components/Form.svelte b/lib/components/Form.svelte
index 2342660..de72ec4 100644
--- a/lib/components/Form.svelte
+++ b/lib/components/Form.svelte
@@ -1,6 +1,6 @@
 <script>
   import {setContext} from 'svelte';
-  import {createForm} from '../createForm';
+  import {createForm} from '../create-form';
   import {key} from './key';
 
   export let initialValues = {};
diff --git a/lib/createForm.js b/lib/create-form.js
similarity index 65%
rename from lib/createForm.js
rename to lib/create-form.js
index 8747587..fe4de7f 100644
--- a/lib/createForm.js
+++ b/lib/create-form.js
@@ -1,9 +1,13 @@
-import { derived, writable } from "svelte/store";
-import { util } from "./util";
+import {derived, writable} from 'svelte/store';
+import {util} from './util';
 
-const NO_ERROR = "";
+const NO_ERROR = '';
 const IS_TOUCHED = true;
 
+function isCheckbox(element) {
+  return element.getAttribute && element.getAttribute('type') === 'checkbox';
+}
+
 export const createForm = config => {
   let initialValues = config.initialValues || {};
 
@@ -18,7 +22,7 @@ export const createForm = config => {
   const getInitial = {
     values: () => util.cloneDeep(initialValues),
     errors: () => util.assignDeep(initialValues, NO_ERROR),
-    touched: () => util.assignDeep(initialValues, !IS_TOUCHED)
+    touched: () => util.assignDeep(initialValues, !IS_TOUCHED),
   };
 
   const form = writable(getInitial.values());
@@ -37,29 +41,25 @@ export const createForm = config => {
   });
 
   const modified = derived(form, $form => {
-    const obj = util.assignDeep($form, false);
+    const object = util.assignDeep($form, false);
 
     for (let key in $form) {
       if ($form[key] !== initialValues[key]) {
-        obj[key] = true;
+        object[key] = true;
       }
     }
 
-    return obj;
+    return object;
   });
 
   const isModified = derived(modified, $modified => {
     return util.getValues($modified).some(field => field === true);
   });
 
-  function isCheckbox(el) {
-    return el.getAttribute && el.getAttribute('type') === 'checkbox';
-  }
-
   function validateField(field) {
-    return util.subscribeOnce(form).then((values) =>
-      validateFieldValue(field, values[field])
-    );
+    return util
+      .subscribeOnce(form)
+      .then(values => validateFieldValue(field, values[field]));
   }
 
   function validateFieldValue(field, value) {
@@ -70,8 +70,8 @@ export const createForm = config => {
       return util
         .reach(validationSchema, field)
         .validate(value)
-        .then(() => util.update(errors, field, ""))
-        .catch(err => util.update(errors, field, err.message))
+        .then(() => util.update(errors, field, ''))
+        .catch(error => util.update(errors, field, error.message))
         .finally(() => {
           isValidating.set(false);
         });
@@ -80,11 +80,11 @@ export const createForm = config => {
     if (validateFn) {
       isValidating.set(true);
       return Promise.resolve()
-        .then(() => validateFn({ [field]: value }))
+        .then(() => validateFn({[field]: value}))
         .then(errs => util.update(errors, field, errs[field]))
         .finally(() => {
           isValidating.set(false);
-        })
+        });
     }
   }
 
@@ -94,11 +94,10 @@ export const createForm = config => {
     });
   }
 
-
   function handleChange(event) {
-    const el = event.target;
-    const field = el.name || el.id;
-    const value = isCheckbox(el) ? el.checked : el.value;
+    const element = event.target;
+    const field = element.name || element.id;
+    const value = isCheckbox(element) ? element.checked : element.value;
 
     return updateValidateField(field, value);
   }
@@ -111,13 +110,15 @@ export const createForm = config => {
     isSubmitting.set(true);
 
     return util.subscribeOnce(form).then(values => {
-      if (typeof validateFn === "function") {
+      if (typeof validateFn === 'function') {
         isValidating.set(true);
 
         return Promise.resolve()
           .then(() => validateFn(values))
-          .then(err =>
-            util.isEmpty(err) ? clearErrorsAndSubmit(values) : errors.set(err)
+          .then(error =>
+            util.isEmpty(error)
+              ? clearErrorsAndSubmit(values)
+              : errors.set(error),
           )
           .finally(() => isValidating.set(false));
       }
@@ -125,18 +126,21 @@ export const createForm = config => {
       if (validationSchema) {
         isValidating.set(true);
 
-        return validationSchema
-          .validate(values, { abortEarly: false })
-          .then(() => clearErrorsAndSubmit(values))
-          .catch(yupErrs => {
-            if (yupErrs && yupErrs.inner) {
-              yupErrs.inner.forEach(error =>
-                util.update(errors, error.path, error.message)
-              );
-            }
-            isSubmitting.set(false);
-          })
-          .finally(() => isValidating.set(false));
+        return (
+          validationSchema
+            .validate(values, {abortEarly: false})
+            .then(() => clearErrorsAndSubmit(values))
+            // eslint-disable-next-line unicorn/catch-error-name
+            .catch(yupErrors => {
+              if (yupErrors && yupErrors.inner) {
+                yupErrors.inner.forEach(error =>
+                  util.update(errors, error.path, error.message),
+                );
+              }
+              isSubmitting.set(false);
+            })
+            .finally(() => isValidating.set(false))
+        );
       }
 
       clearErrorsAndSubmit(values);
@@ -151,7 +155,7 @@ export const createForm = config => {
 
   function clearErrorsAndSubmit(values) {
     return Promise.resolve()
-      .then(() => errors.set(util.assignDeep(values, "")))
+      .then(() => errors.set(util.assignDeep(values, '')))
       .then(() => onSubmit(values, form, errors))
       .finally(() => isSubmitting.set(false));
   }
@@ -171,11 +175,12 @@ export const createForm = config => {
   }
 
   function isInitialValuesValid() {
-    if (Object.keys(initialValues).length < 1) {
+    if (Object.keys(initialValues).length === 0) {
       const provided = JSON.stringify(initialValues);
 
+      // eslint-disable-next-line no-undef
       console.warn(
-        `createForm requires initialValues to be a non empty object or array, provided ${provided}`
+        `createForm requires initialValues to be a non empty object or array, provided ${provided}`,
       );
 
       return false;
@@ -215,8 +220,26 @@ export const createForm = config => {
     validateField,
     updateInitialValues,
     state: derived(
-      [form, errors, touched, modified, isValid, isValidating, isSubmitting, isModified],
-      ([$form, $errors, $touched, $modified, $isValid, $isValidating, $isSubmitting, $isModified]) => ({
+      [
+        form,
+        errors,
+        touched,
+        modified,
+        isValid,
+        isValidating,
+        isSubmitting,
+        isModified,
+      ],
+      ([
+        $form,
+        $errors,
+        $touched,
+        $modified,
+        $isValid,
+        $isValidating,
+        $isSubmitting,
+        $isModified,
+      ]) => ({
         form: $form,
         errors: $errors,
         touched: $touched,
@@ -224,8 +247,8 @@ export const createForm = config => {
         isValid: $isValid,
         isSubmitting: $isSubmitting,
         isValidating: $isValidating,
-        isModified: $isModified
-      })
-    )
+        isModified: $isModified,
+      }),
+    ),
   };
 };
diff --git a/lib/index.js b/lib/index.js
index 57d9b7a..3583e52 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -1,5 +1,5 @@
-export { createForm } from "./createForm";
-export { default as Form } from "./components/Form.svelte";
-export { default as Field } from "./components/Field.svelte";
-export { default as Select } from "./components/Select.svelte";
-export { default as ErrorMessage } from "./components/ErrorMessage.svelte";
+export {createForm} from './create-form';
+export {default as Form} from './components/Form.svelte';
+export {default as Field} from './components/Field.svelte';
+export {default as Select} from './components/Select.svelte';
+export {default as ErrorMessage} from './components/ErrorMessage.svelte';
diff --git a/lib/util.js b/lib/util.js
index 14859fc..b215c57 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -1,4 +1,4 @@
-import { forEach } from "property-expr";
+import {forEach} from 'property-expr';
 
 function subscribeOnce(observable) {
   return new Promise(resolve => {
@@ -6,70 +6,80 @@ function subscribeOnce(observable) {
   });
 }
 
-function update(obj, path, val) {
-  obj.update(o => {
-    set(o, path, val);
+function update(object, path, value) {
+  object.update(o => {
+    set(o, path, value);
     return o;
   });
 }
 
-function cloneDeep(obj) {
-  return JSON.parse(JSON.stringify(obj));
+function cloneDeep(object) {
+  return JSON.parse(JSON.stringify(object));
 }
 
-function isEmpty(obj) {
-  return Object.keys(obj).length <= 0;
+function isEmpty(object) {
+  return Object.keys(object).length <= 0;
 }
 
-function getValues(obj) {
+function getValues(object) {
   let result = [];
-  for (const key in obj) {
-    result = result.concat(typeof obj[key] === "object" ? getValues(obj[key]) : obj[key]);
+  for (const key in object) {
+    result = result.concat(
+      typeof object[key] === 'object' ? getValues(object[key]) : object[key],
+    );
   }
   return result;
 }
 
-function assignDeep(obj, val) {
-  if (Array.isArray(obj)) {
-    return obj.map(o => assignDeep(o, val));
+function assignDeep(object, value) {
+  if (Array.isArray(object)) {
+    return object.map(o => assignDeep(o, value));
   }
   const copy = {};
-  for (const key in obj) {
-    copy[key] = typeof obj[key] === "object" ? assignDeep(obj[key], val) : val;
+  for (const key in object) {
+    copy[key] =
+      typeof object[key] === 'object' ? assignDeep(object[key], value) : value;
   }
   return copy;
 }
 
 function has(object, key) {
-  return object != null && Object.prototype.hasOwnProperty.call(object, key);
+  return (
+    object != undefined && Object.prototype.hasOwnProperty.call(object, key)
+  );
 }
 
-function set(obj, path, value) {
-  if (Object(obj) !== obj) return obj;
+function set(object, path, value) {
+  if (new Object(object) !== object) return object;
+
   if (!Array.isArray(path)) {
     path = path.toString().match(/[^.[\]]+/g) || [];
   }
-  const res = path
+
+  const result = path
     .slice(0, -1)
     .reduce(
-      (acc, key, index) =>
-        Object(acc[key]) === acc[key]
-          ? acc[key]
-          : (acc[key] = Math.abs(path[index + 1]) >> 0 === +path[index + 1] ? [] : {}),
-      obj
+      (accumulator, key, index) =>
+        new Object(accumulator[key]) === accumulator[key]
+          ? accumulator[key]
+          : (accumulator[key] =
+              Math.abs(path[index + 1]) >> 0 === +path[index + 1] ? [] : {}),
+      object,
     );
-  res[path[path.length - 1]] = value;
-  return obj;
+
+  result[path[path.length - 1]] = value;
+
+  return object;
 }
 
 // Implementation of yup.reach
 // TODO rewrite to simpler version and remove dependency on forEach
-function reach(obj, path, value, context) {
-  return getIn(obj, path, value, context).schema;
+function reach(object, path, value, context) {
+  return getIn(object, path, value, context).schema;
 }
 
 function trim(part) {
-  return part.substr(0, part.length - 1).substr(1);
+  return part.slice(0, -1).slice(1);
 }
 
 function getIn(schema, path, value, context) {
@@ -81,39 +91,40 @@ function getIn(schema, path, value, context) {
     return {
       parent,
       parentPath: path,
-      schema
+      schema,
     };
 
   forEach(path, (_part, isBracket, isArray) => {
     let part = isBracket ? trim(_part) : _part;
 
-    if (isArray || has(schema, "_subType")) {
-      let index = isArray ? parseInt(part, 10) : 0;
-      schema = schema.resolve({ context, parent, value })._subType;
+    if (isArray || has(schema, '_subType')) {
+      let index = isArray ? Number.parseInt(part, 10) : 0;
+      schema = schema.resolve({context, parent, value})._subType;
       if (value) {
         value = value[index];
       }
     }
 
     if (!isArray) {
-      schema = schema.resolve({ context, parent, value });
+      schema = schema.resolve({context, parent, value});
       schema = schema.fields[part];
       parent = value;
       value = value && value[part];
       lastPart = part;
-      lastPartDebug = isBracket ? "[" + _part + "]" : "." + _part;
+      // eslint-disable-next-line no-unused-vars
+      lastPartDebug = isBracket ? '[' + _part + ']' : '.' + _part;
     }
   });
 
-  return { schema, parent, parentPath: lastPart };
+  return {schema, parent, parentPath: lastPart};
 }
 
 export const util = {
-  subscribeOnce,
-  update,
+  assignDeep,
   cloneDeep,
+  getValues,
   isEmpty,
-  assignDeep,
   reach,
-  getValues
+  subscribeOnce,
+  update,
 };
diff --git a/package-lock.json b/package-lock.json
index 77f7653..c797e85 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1136,6 +1136,12 @@
         "acorn-walk": "^7.1.1"
       }
     },
+    "acorn-jsx": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.2.0.tgz",
+      "integrity": "sha512-HiUX/+K2YpkpJ+SzBffkM/AQ2YE03S0U1kjTLVpoJdhZMOWy8qvXVN9JdLqv2QsaQ6MPYQIuNmwD8zOiYUofLQ==",
+      "dev": true
+    },
     "acorn-walk": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-7.2.0.tgz",
@@ -1297,6 +1303,20 @@
       "integrity": "sha512-3YDiu347mtVtjpyV3u5kVqQLP242c06zwDOgpeRnybmXlYYsLbtTrUBUm8i8srONt+FWobl5aibnU1030PeeuA==",
       "dev": true
     },
+    "babel-eslint": {
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/babel-eslint/-/babel-eslint-10.1.0.tgz",
+      "integrity": "sha512-ifWaTHQ0ce+448CYop8AdrQiBsGrnC+bMgfyKFdi6EsPLTAWG+QfyDeM6OH+FmWnKvEq5NnBMLvlBUPKQZoDSg==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.0.0",
+        "@babel/parser": "^7.7.0",
+        "@babel/traverse": "^7.7.0",
+        "@babel/types": "^7.7.0",
+        "eslint-visitor-keys": "^1.0.0",
+        "resolve": "^1.12.0"
+      }
+    },
     "babel-jest": {
       "version": "26.1.0",
       "resolved": "https://registry.npmjs.org/babel-jest/-/babel-jest-26.1.0.tgz",
@@ -1614,6 +1634,15 @@
         }
       }
     },
+    "clean-regexp": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/clean-regexp/-/clean-regexp-1.0.0.tgz",
+      "integrity": "sha1-jffHquUf02h06PjQW5GAvBGj/tc=",
+      "dev": true,
+      "requires": {
+        "escape-string-regexp": "^1.0.5"
+      }
+    },
     "clean-stack": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-2.2.0.tgz",
@@ -1938,6 +1967,29 @@
         }
       }
     },
+    "create-jest-runner": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/create-jest-runner/-/create-jest-runner-0.6.0.tgz",
+      "integrity": "sha512-9ibH8XA4yOJwDLRlzIUv5Ceg2DZFrQFjEtRKplVP6scGKwoz28V27xPHTbXziq2LePAD/xXlJlywhUq1dtF+nw==",
+      "dev": true,
+      "requires": {
+        "chalk": "^3.0.0",
+        "jest-worker": "^25.1.0",
+        "throat": "^5.0.0"
+      },
+      "dependencies": {
+        "jest-worker": {
+          "version": "25.5.0",
+          "resolved": "https://registry.npmjs.org/jest-worker/-/jest-worker-25.5.0.tgz",
+          "integrity": "sha512-/dsSmUkIy5EBGfv/IjjqmFxrNAUpBERfGs1oHROyD7yxjG/w+t0GOJDX8O1k32ySmd7+a5IhnJU2qQFcJ4n1vw==",
+          "dev": true,
+          "requires": {
+            "merge-stream": "^2.0.0",
+            "supports-color": "^7.0.0"
+          }
+        }
+      }
+    },
     "cross-env": {
       "version": "7.0.2",
       "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-7.0.2.tgz",
@@ -2246,6 +2298,15 @@
       "integrity": "sha512-Hq8o7+6GaZeoFjtpgvRBUknSXNeJiCx7V9Fr94ZMljNiCr9n9L8H8aJqgWOQiDDGdyn29fRNcDdRVJ5fdyihfg==",
       "dev": true
     },
+    "doctrine": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
+      "integrity": "sha512-yS+Q5i3hBf7GBkd4KG8a7eBNNWNGLTaEwwYWUijIYM7zrlYDM0BFXHjjPWlWZ1Rg7UaddZeIDmi9jF3HmqiQ2w==",
+      "dev": true,
+      "requires": {
+        "esutils": "^2.0.2"
+      }
+    },
     "domexception": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/domexception/-/domexception-2.0.1.tgz",
@@ -2325,12 +2386,300 @@
         "source-map": "~0.6.1"
       }
     },
+    "eslint": {
+      "version": "7.4.0",
+      "resolved": "https://registry.npmjs.org/eslint/-/eslint-7.4.0.tgz",
+      "integrity": "sha512-gU+lxhlPHu45H3JkEGgYhWhkR9wLHHEXC9FbWFnTlEkbKyZKWgWRLgf61E8zWmBuI6g5xKBph9ltg3NtZMVF8g==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.0.0",
+        "ajv": "^6.10.0",
+        "chalk": "^4.0.0",
+        "cross-spawn": "^7.0.2",
+        "debug": "^4.0.1",
+        "doctrine": "^3.0.0",
+        "enquirer": "^2.3.5",
+        "eslint-scope": "^5.1.0",
+        "eslint-utils": "^2.0.0",
+        "eslint-visitor-keys": "^1.2.0",
+        "espree": "^7.1.0",
+        "esquery": "^1.2.0",
+        "esutils": "^2.0.2",
+        "file-entry-cache": "^5.0.1",
+        "functional-red-black-tree": "^1.0.1",
+        "glob-parent": "^5.0.0",
+        "globals": "^12.1.0",
+        "ignore": "^4.0.6",
+        "import-fresh": "^3.0.0",
+        "imurmurhash": "^0.1.4",
+        "is-glob": "^4.0.0",
+        "js-yaml": "^3.13.1",
+        "json-stable-stringify-without-jsonify": "^1.0.1",
+        "levn": "^0.4.1",
+        "lodash": "^4.17.14",
+        "minimatch": "^3.0.4",
+        "natural-compare": "^1.4.0",
+        "optionator": "^0.9.1",
+        "progress": "^2.0.0",
+        "regexpp": "^3.1.0",
+        "semver": "^7.2.1",
+        "strip-ansi": "^6.0.0",
+        "strip-json-comments": "^3.1.0",
+        "table": "^5.2.3",
+        "text-table": "^0.2.0",
+        "v8-compile-cache": "^2.0.3"
+      },
+      "dependencies": {
+        "chalk": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.0.tgz",
+          "integrity": "sha512-qwx12AxXe2Q5xQ43Ac//I6v5aXTipYrSESdOgzrN+9XjgEpyjpKuvSGaN4qE93f7TQTlerQQ8S+EQ0EyDoVL1A==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^4.1.0",
+            "supports-color": "^7.1.0"
+          }
+        },
+        "cross-spawn": {
+          "version": "7.0.3",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
+          "integrity": "sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==",
+          "dev": true,
+          "requires": {
+            "path-key": "^3.1.0",
+            "shebang-command": "^2.0.0",
+            "which": "^2.0.1"
+          }
+        },
+        "globals": {
+          "version": "12.4.0",
+          "resolved": "https://registry.npmjs.org/globals/-/globals-12.4.0.tgz",
+          "integrity": "sha512-BWICuzzDvDoH54NHKCseDanAhE3CeDorgDL5MT6LMXXj2WCnd9UC2szdk4AWLfjdgNBCXLUanXYcpBBKOSWGwg==",
+          "dev": true,
+          "requires": {
+            "type-fest": "^0.8.1"
+          }
+        },
+        "levn": {
+          "version": "0.4.1",
+          "resolved": "https://registry.npmjs.org/levn/-/levn-0.4.1.tgz",
+          "integrity": "sha512-+bT2uH4E5LGE7h/n3evcS/sQlJXCpIp6ym8OWJ5eV6+67Dsql/LaaT7qJBAt2rzfoa/5QBGBhxDix1dMt2kQKQ==",
+          "dev": true,
+          "requires": {
+            "prelude-ls": "^1.2.1",
+            "type-check": "~0.4.0"
+          }
+        },
+        "optionator": {
+          "version": "0.9.1",
+          "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.9.1.tgz",
+          "integrity": "sha512-74RlY5FCnhq4jRxVUPKDaRwrVNXMqsGsiW6AJw4XK8hmtm10wC0ypZBLw5IIp85NZMr91+qd1RvvENwg7jjRFw==",
+          "dev": true,
+          "requires": {
+            "deep-is": "^0.1.3",
+            "fast-levenshtein": "^2.0.6",
+            "levn": "^0.4.1",
+            "prelude-ls": "^1.2.1",
+            "type-check": "^0.4.0",
+            "word-wrap": "^1.2.3"
+          }
+        },
+        "path-key": {
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
+          "integrity": "sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==",
+          "dev": true
+        },
+        "prelude-ls": {
+          "version": "1.2.1",
+          "resolved": "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.2.1.tgz",
+          "integrity": "sha512-vkcDPrRZo1QZLbn5RLGPpg/WmIQ65qoWWhcGKf/b5eplkkarX0m9z8ppCat4mlOqUsWpyNuYgO3VRyrYHSzX5g==",
+          "dev": true
+        },
+        "semver": {
+          "version": "7.3.2",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.2.tgz",
+          "integrity": "sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ==",
+          "dev": true
+        },
+        "shebang-command": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
+          "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
+          "dev": true,
+          "requires": {
+            "shebang-regex": "^3.0.0"
+          }
+        },
+        "shebang-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
+          "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
+          "dev": true
+        },
+        "strip-ansi": {
+          "version": "6.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
+          "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^5.0.0"
+          }
+        },
+        "strip-json-comments": {
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-3.1.1.tgz",
+          "integrity": "sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==",
+          "dev": true
+        },
+        "type-check": {
+          "version": "0.4.0",
+          "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
+          "integrity": "sha512-XleUoc9uwGXqjWwXaUTZAmzMcFZ5858QA2vvx1Ur5xIcixXIP+8LnFDgRplU30us6teqdlskFfu+ae4K79Ooew==",
+          "dev": true,
+          "requires": {
+            "prelude-ls": "^1.2.1"
+          }
+        }
+      }
+    },
+    "eslint-ast-utils": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/eslint-ast-utils/-/eslint-ast-utils-1.1.0.tgz",
+      "integrity": "sha512-otzzTim2/1+lVrlH19EfQQJEhVJSu0zOb9ygb3iapN6UlyaDtyRq4b5U1FuW0v1lRa9Fp/GJyHkSwm6NqABgCA==",
+      "dev": true,
+      "requires": {
+        "lodash.get": "^4.4.2",
+        "lodash.zip": "^4.2.0"
+      }
+    },
+    "eslint-config-prettier": {
+      "version": "6.11.0",
+      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-6.11.0.tgz",
+      "integrity": "sha512-oB8cpLWSAjOVFEJhhyMZh6NOEOtBVziaqdDQ86+qhDHFbZXoRTM7pNSvFRfW/W/L/LrQ38C99J5CGuRBBzBsdA==",
+      "dev": true,
+      "requires": {
+        "get-stdin": "^6.0.0"
+      }
+    },
+    "eslint-plugin-unicorn": {
+      "version": "20.1.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-unicorn/-/eslint-plugin-unicorn-20.1.0.tgz",
+      "integrity": "sha512-XQxLBJT/gnwyRR6cfYsIK1AdekQchAt5tmcsnldevGjgR2xoZsRUa5/i6e0seNHy2RoT57CkTnbVHwHF8No8LA==",
+      "dev": true,
+      "requires": {
+        "ci-info": "^2.0.0",
+        "clean-regexp": "^1.0.0",
+        "eslint-ast-utils": "^1.1.0",
+        "eslint-template-visitor": "^2.0.0",
+        "eslint-utils": "^2.0.0",
+        "import-modules": "^2.0.0",
+        "lodash": "^4.17.15",
+        "pluralize": "^8.0.0",
+        "read-pkg-up": "^7.0.1",
+        "regexp-tree": "^0.1.21",
+        "reserved-words": "^0.1.2",
+        "safe-regex": "^2.1.1",
+        "semver": "^7.3.2"
+      },
+      "dependencies": {
+        "safe-regex": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/safe-regex/-/safe-regex-2.1.1.tgz",
+          "integrity": "sha512-rx+x8AMzKb5Q5lQ95Zoi6ZbJqwCLkqi3XuJXp5P3rT8OEc6sZCJG5AE5dU3lsgRr/F4Bs31jSlVN+j5KrsGu9A==",
+          "dev": true,
+          "requires": {
+            "regexp-tree": "~0.1.1"
+          }
+        },
+        "semver": {
+          "version": "7.3.2",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.2.tgz",
+          "integrity": "sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ==",
+          "dev": true
+        }
+      }
+    },
+    "eslint-scope": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-5.1.0.tgz",
+      "integrity": "sha512-iiGRvtxWqgtx5m8EyQUJihBloE4EnYeGE/bz1wSPwJE6tZuJUtHlhqDM4Xj2ukE8Dyy1+HCZ4hE0fzIVMzb58w==",
+      "dev": true,
+      "requires": {
+        "esrecurse": "^4.1.0",
+        "estraverse": "^4.1.1"
+      }
+    },
+    "eslint-template-visitor": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/eslint-template-visitor/-/eslint-template-visitor-2.2.1.tgz",
+      "integrity": "sha512-q3SxoBXz0XjPGkUpwGVAwIwIPIxzCAJX1uwfVc8tW3v7u/zS7WXNH3I2Mu2MDz2NgSITAyKLRaQFPHu/iyKxDQ==",
+      "dev": true,
+      "requires": {
+        "babel-eslint": "^10.1.0",
+        "eslint-visitor-keys": "^1.3.0",
+        "esquery": "^1.3.1",
+        "multimap": "^1.1.0"
+      }
+    },
+    "eslint-utils": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-2.1.0.tgz",
+      "integrity": "sha512-w94dQYoauyvlDc43XnGB8lU3Zt713vNChgt4EWwhXAP2XkBvndfxF0AgIqKOOasjPIPzj9JqgwkwbCYD0/V3Zg==",
+      "dev": true,
+      "requires": {
+        "eslint-visitor-keys": "^1.1.0"
+      }
+    },
+    "eslint-visitor-keys": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-1.3.0.tgz",
+      "integrity": "sha512-6J72N8UNa462wa/KFODt/PJ3IU60SDpC3QXC1Hjc1BXXpfL2C9R5+AU7jhe0F6GREqVMh4Juu+NY7xn+6dipUQ==",
+      "dev": true
+    },
+    "espree": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/espree/-/espree-7.1.0.tgz",
+      "integrity": "sha512-dcorZSyfmm4WTuTnE5Y7MEN1DyoPYy1ZR783QW1FJoenn7RailyWFsq/UL6ZAAA7uXurN9FIpYyUs3OfiIW+Qw==",
+      "dev": true,
+      "requires": {
+        "acorn": "^7.2.0",
+        "acorn-jsx": "^5.2.0",
+        "eslint-visitor-keys": "^1.2.0"
+      }
+    },
     "esprima": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
       "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==",
       "dev": true
     },
+    "esquery": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/esquery/-/esquery-1.3.1.tgz",
+      "integrity": "sha512-olpvt9QG0vniUBZspVRN6lwB7hOZoTRtT+jzR+tS4ffYx2mzbw+z0XCOk44aaLYKApNX5nMm+E+P6o25ip/DHQ==",
+      "dev": true,
+      "requires": {
+        "estraverse": "^5.1.0"
+      },
+      "dependencies": {
+        "estraverse": {
+          "version": "5.1.0",
+          "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-5.1.0.tgz",
+          "integrity": "sha512-FyohXK+R0vE+y1nHLoBM7ZTyqRpqAlhdZHCWIWEviFLiGB8b04H6bQs8G+XTthacvT8VuwvteiP7RJSxMs8UEw==",
+          "dev": true
+        }
+      }
+    },
+    "esrecurse": {
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/esrecurse/-/esrecurse-4.2.1.tgz",
+      "integrity": "sha512-64RBB++fIOAXPw3P9cy89qfMlvZEXZkqqJkjqqXIvzP5ezRZjW+lPWjw35UX/3EhUPFYbg5ER4JYgDw4007/DQ==",
+      "dev": true,
+      "requires": {
+        "estraverse": "^4.1.0"
+      }
+    },
     "estraverse": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-4.3.0.tgz",
@@ -2624,6 +2973,15 @@
         "escape-string-regexp": "^1.0.5"
       }
     },
+    "file-entry-cache": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/file-entry-cache/-/file-entry-cache-5.0.1.tgz",
+      "integrity": "sha512-bCg29ictuBaKUwwArK4ouCaqDgLZcysCFLmM/Yn/FDoqndh/9vNuQfXRDvTuXKLxfD/JtZQGKFT8MGcJBK644g==",
+      "dev": true,
+      "requires": {
+        "flat-cache": "^2.0.1"
+      }
+    },
     "fill-range": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
@@ -2784,6 +3142,34 @@
         }
       }
     },
+    "flat-cache": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/flat-cache/-/flat-cache-2.0.1.tgz",
+      "integrity": "sha512-LoQe6yDuUMDzQAEH8sgmh4Md6oZnc/7PjtwjNFSzveXqSHt6ka9fPBuso7IGf9Rz4uqnSnWiFH2B/zj24a5ReA==",
+      "dev": true,
+      "requires": {
+        "flatted": "^2.0.0",
+        "rimraf": "2.6.3",
+        "write": "1.0.3"
+      },
+      "dependencies": {
+        "rimraf": {
+          "version": "2.6.3",
+          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.3.tgz",
+          "integrity": "sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA==",
+          "dev": true,
+          "requires": {
+            "glob": "^7.1.3"
+          }
+        }
+      }
+    },
+    "flatted": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/flatted/-/flatted-2.0.2.tgz",
+      "integrity": "sha512-r5wGx7YeOwNWNlCA0wQ86zKyDLMQr+/RB8xy74M4hTphfmjlijTSSXGuH8rnvKZnfT9i+75zmd8jcKdMR4O6jA==",
+      "dev": true
+    },
     "fn-name": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/fn-name/-/fn-name-3.0.0.tgz",
@@ -2846,6 +3232,12 @@
       "dev": true,
       "optional": true
     },
+    "functional-red-black-tree": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz",
+      "integrity": "sha1-GwqzvVU7Kg1jmdKcDj6gslIHgyc=",
+      "dev": true
+    },
     "gensync": {
       "version": "1.0.0-beta.1",
       "resolved": "https://registry.npmjs.org/gensync/-/gensync-1.0.0-beta.1.tgz",
@@ -2870,6 +3262,12 @@
       "integrity": "sha512-pjzuKtY64GYfWizNAJ0fr9VqttZkNiK2iS430LtIHzjBEr6bX8Am2zm4sW4Ro5wjWW5cAlRL1qAMTcXbjNAO2Q==",
       "dev": true
     },
+    "get-stdin": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-6.0.0.tgz",
+      "integrity": "sha512-jp4tHawyV7+fkkSKyvjuLZswblUtz+SQKzSWnBbii16BuZksJlU1wuBYXY75r+duh/llF1ur6oNwi+2ZzjKZ7g==",
+      "dev": true
+    },
     "get-stream": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-4.1.0.tgz",
@@ -2908,6 +3306,15 @@
         "path-is-absolute": "^1.0.0"
       }
     },
+    "glob-parent": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.1.tgz",
+      "integrity": "sha512-FnI+VGOpnlGHWZxthPGR+QhR78fuiK0sNLkHQv+bL9fQi57lNNdquIbna/WrfROrolq8GK5Ek6BiMwqL/voRYQ==",
+      "dev": true,
+      "requires": {
+        "is-glob": "^4.0.1"
+      }
+    },
     "global-dirs": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/global-dirs/-/global-dirs-0.1.1.tgz",
@@ -3132,6 +3539,12 @@
         "safer-buffer": ">= 2.1.2 < 3"
       }
     },
+    "ignore": {
+      "version": "4.0.6",
+      "resolved": "https://registry.npmjs.org/ignore/-/ignore-4.0.6.tgz",
+      "integrity": "sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==",
+      "dev": true
+    },
     "import-fresh": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-3.2.1.tgz",
@@ -3152,6 +3565,12 @@
         "resolve-cwd": "^3.0.0"
       }
     },
+    "import-modules": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/import-modules/-/import-modules-2.0.0.tgz",
+      "integrity": "sha512-iczM/v9drffdNnABOKwj0f9G3cFDon99VcG1mxeBsdqnbd+vnQ5c2uAiCHNQITqFTOPaEvwg3VjoWCur0uHLEw==",
+      "dev": true
+    },
     "imurmurhash": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/imurmurhash/-/imurmurhash-0.1.4.tgz",
@@ -4598,6 +5017,17 @@
         }
       }
     },
+    "jest-runner-eslint": {
+      "version": "0.10.0",
+      "resolved": "https://registry.npmjs.org/jest-runner-eslint/-/jest-runner-eslint-0.10.0.tgz",
+      "integrity": "sha512-XXKz2hMLGvyH50i29UcNQDQY2Sj1hLuCn7H3otMdeOB2LOzdHXXif3RXX+8m/eAewflB5RqqqlF1K7FozYZKrg==",
+      "dev": true,
+      "requires": {
+        "chalk": "^3.0.0",
+        "cosmiconfig": "^6.0.0",
+        "create-jest-runner": "^0.6.0"
+      }
+    },
     "jest-runtime": {
       "version": "26.1.0",
       "resolved": "https://registry.npmjs.org/jest-runtime/-/jest-runtime-26.1.0.tgz",
@@ -4987,6 +5417,53 @@
         }
       }
     },
+    "jest-watch-select-projects": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/jest-watch-select-projects/-/jest-watch-select-projects-2.0.0.tgz",
+      "integrity": "sha512-j00nW4dXc2NiCW6znXgFLF9g8PJ0zP25cpQ1xRro/HU2GBfZQFZD0SoXnAlaoKkIY4MlfTMkKGbNXFpvCdjl1w==",
+      "dev": true,
+      "requires": {
+        "ansi-escapes": "^4.3.0",
+        "chalk": "^3.0.0",
+        "prompts": "^2.2.1"
+      }
+    },
+    "jest-watch-typeahead": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/jest-watch-typeahead/-/jest-watch-typeahead-0.6.0.tgz",
+      "integrity": "sha512-mY0u5D1U/mEzeO/tpcDWnWaakuQiBp8gZY1K0HxduMeKSYm4WvbBVfU15a/hWMMs4J9FrXaYjAWs5XGlOpx5IQ==",
+      "dev": true,
+      "requires": {
+        "ansi-escapes": "^4.3.1",
+        "chalk": "^4.0.0",
+        "jest-regex-util": "^26.0.0",
+        "jest-watcher": "^26.0.0",
+        "slash": "^3.0.0",
+        "string-length": "^4.0.1",
+        "strip-ansi": "^6.0.0"
+      },
+      "dependencies": {
+        "chalk": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.0.tgz",
+          "integrity": "sha512-qwx12AxXe2Q5xQ43Ac//I6v5aXTipYrSESdOgzrN+9XjgEpyjpKuvSGaN4qE93f7TQTlerQQ8S+EQ0EyDoVL1A==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^4.1.0",
+            "supports-color": "^7.1.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "6.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
+          "integrity": "sha512-AuvKTrTfQNYNIctbR1K/YGTR1756GycPsg7b9bdV9Duqur4gv6aKqHXah67Z8ImS7WEz5QVcOtlfW2rZEugt6w==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^5.0.0"
+          }
+        }
+      }
+    },
     "jest-watcher": {
       "version": "26.1.0",
       "resolved": "https://registry.npmjs.org/jest-watcher/-/jest-watcher-26.1.0.tgz",
@@ -5115,6 +5592,12 @@
       "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
       "dev": true
     },
+    "json-stable-stringify-without-jsonify": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/json-stable-stringify-without-jsonify/-/json-stable-stringify-without-jsonify-1.0.1.tgz",
+      "integrity": "sha1-nbe1lJatPzz+8wp1FC0tkwrXJlE=",
+      "dev": true
+    },
     "json-stringify-safe": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
@@ -5343,6 +5826,12 @@
       "integrity": "sha512-rlrc3yU3+JNOpZ9zj5pQtxnx2THmvRykwL4Xlxoa8I9lHBlVbbyPhgyPMioxVZ4NqyxaVVtaJnzsyOidQIhyyQ==",
       "dev": true
     },
+    "lodash.get": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
+      "integrity": "sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk=",
+      "dev": true
+    },
     "lodash.map": {
       "version": "4.6.0",
       "resolved": "https://registry.npmjs.org/lodash.map/-/lodash.map-4.6.0.tgz",
@@ -5355,6 +5844,12 @@
       "integrity": "sha1-7dFMgk4sycHgsKG0K7UhBRakJDg=",
       "dev": true
     },
+    "lodash.zip": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/lodash.zip/-/lodash.zip-4.2.0.tgz",
+      "integrity": "sha1-7GZi5IlkCO1KtsVCo5kLcswIACA=",
+      "dev": true
+    },
     "log-symbols": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/log-symbols/-/log-symbols-4.0.0.tgz",
@@ -5579,12 +6074,27 @@
         }
       }
     },
+    "mkdirp": {
+      "version": "0.5.5",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
+      "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
+      "dev": true,
+      "requires": {
+        "minimist": "^1.2.5"
+      }
+    },
     "ms": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
       "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
       "dev": true
     },
+    "multimap": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/multimap/-/multimap-1.1.0.tgz",
+      "integrity": "sha512-0ZIR9PasPxGXmRsEF8jsDzndzHDj7tIav+JUmvIFB/WHswliFnquxECT/De7GR4yg99ky/NlRKJT82G1y271bw==",
+      "dev": true
+    },
     "mute-stream": {
       "version": "0.0.7",
       "resolved": "https://registry.npmjs.org/mute-stream/-/mute-stream-0.0.7.tgz",
@@ -5983,6 +6493,12 @@
         "semver-compare": "^1.0.0"
       }
     },
+    "pluralize": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/pluralize/-/pluralize-8.0.0.tgz",
+      "integrity": "sha512-Nc3IT5yHzflTfbjgqWcCPpo7DaKy4FnpB0l/zCAW0Tc7jxAiuqSxHasntB3D7887LSrA93kDJ9IXovxJYxyLCA==",
+      "dev": true
+    },
     "posix-character-classes": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/posix-character-classes/-/posix-character-classes-0.1.1.tgz",
@@ -6019,6 +6535,12 @@
         "react-is": "^16.12.0"
       }
     },
+    "progress": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/progress/-/progress-2.0.3.tgz",
+      "integrity": "sha512-7PiHtLll5LdnKIMw100I+8xJXR5gW2QwWYkT6iJva0bXitZKa/XMrSbdmg3r2Xnaidz9Qumd0VPaMrZlF9V9sA==",
+      "dev": true
+    },
     "prompts": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/prompts/-/prompts-2.3.2.tgz",
@@ -6174,6 +6696,18 @@
         "safe-regex": "^1.1.0"
       }
     },
+    "regexp-tree": {
+      "version": "0.1.21",
+      "resolved": "https://registry.npmjs.org/regexp-tree/-/regexp-tree-0.1.21.tgz",
+      "integrity": "sha512-kUUXjX4AnqnR8KRTCrayAo9PzYMRKmVoGgaz2tBuz0MF3g1ZbGebmtW0yFHfFK9CmBjQKeYIgoL22pFLBJY7sw==",
+      "dev": true
+    },
+    "regexpp": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/regexpp/-/regexpp-3.1.0.tgz",
+      "integrity": "sha512-ZOIzd8yVsQQA7j8GCSlPGXwg5PfmA1mrq0JP4nGhh54LaKN3xdai/vHUDu74pKwV8OxseMS65u2NImosQcSD0Q==",
+      "dev": true
+    },
     "remove-trailing-separator": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/remove-trailing-separator/-/remove-trailing-separator-1.1.0.tgz",
@@ -6288,6 +6822,12 @@
       "integrity": "sha1-eZlTn8ngR6N5KPoZb44VY9q9Nt4=",
       "dev": true
     },
+    "reserved-words": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/reserved-words/-/reserved-words-0.1.2.tgz",
+      "integrity": "sha1-AKCUD5jNUBrqqsMWQR2a3FKzGrE=",
+      "dev": true
+    },
     "resolve": {
       "version": "1.14.1",
       "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.14.1.tgz",
@@ -7141,6 +7681,61 @@
       "integrity": "sha512-R9N6uDkVsghHePKh1TEqbnLddO2IY25OcsksyFp/qBe7XYd0PVbKEWxhcdMhpLzE1I6skj5l4aEZ3CRxcbArlA==",
       "dev": true
     },
+    "table": {
+      "version": "5.4.6",
+      "resolved": "https://registry.npmjs.org/table/-/table-5.4.6.tgz",
+      "integrity": "sha512-wmEc8m4fjnob4gt5riFRtTu/6+4rSe12TpAELNSqHMfF3IqnA+CH37USM6/YR3qRZv7e56kAEAtd6nKZaxe0Ug==",
+      "dev": true,
+      "requires": {
+        "ajv": "^6.10.2",
+        "lodash": "^4.17.14",
+        "slice-ansi": "^2.1.0",
+        "string-width": "^3.0.0"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "astral-regex": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-1.0.0.tgz",
+          "integrity": "sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==",
+          "dev": true
+        },
+        "color-convert": {
+          "version": "1.9.3",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+          "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+          "dev": true,
+          "requires": {
+            "color-name": "1.1.3"
+          }
+        },
+        "color-name": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+          "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
+          "dev": true
+        },
+        "slice-ansi": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/slice-ansi/-/slice-ansi-2.1.0.tgz",
+          "integrity": "sha512-Qu+VC3EwYLldKa1fCxuuvULvSJOKEgk9pi8dZeCVK7TqBfUNTH4sFkk4joj8afVSfAYgJoSOetjx9QWOJ5mYoQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.0",
+            "astral-regex": "^1.0.0",
+            "is-fullwidth-code-point": "^2.0.0"
+          }
+        }
+      }
+    },
     "terminal-link": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/terminal-link/-/terminal-link-2.1.1.tgz",
@@ -7162,6 +7757,12 @@
         "minimatch": "^3.0.4"
       }
     },
+    "text-table": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/text-table/-/text-table-0.2.0.tgz",
+      "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=",
+      "dev": true
+    },
     "throat": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/throat/-/throat-5.0.0.tgz",
@@ -7405,6 +8006,12 @@
       "dev": true,
       "optional": true
     },
+    "v8-compile-cache": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.1.1.tgz",
+      "integrity": "sha512-8OQ9CL+VWyt3JStj7HX7/ciTL2V3Rl1Wf5OL+SNTm0yK1KvtReVulksyeRnCANHHuUxHlQig+JJDlUhBt1NQDQ==",
+      "dev": true
+    },
     "v8-to-istanbul": {
       "version": "4.1.4",
       "resolved": "https://registry.npmjs.org/v8-to-istanbul/-/v8-to-istanbul-4.1.4.tgz",
@@ -7582,6 +8189,15 @@
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
     },
+    "write": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/write/-/write-1.0.3.tgz",
+      "integrity": "sha512-/lg70HAjtkUgWPVZhZcm+T4hkL8Zbtp1nFNOn3lRrxnlv50SRBv7cR7RqR+GMsd3hUXy9hWBo4CHTbFTcOYwig==",
+      "dev": true,
+      "requires": {
+        "mkdirp": "^0.5.1"
+      }
+    },
     "write-file-atomic": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-3.0.3.tgz",
diff --git a/package.json b/package.json
index cb301ba..499b014 100644
--- a/package.json
+++ b/package.json
@@ -47,8 +47,14 @@
     "concurrently": "5.2.0",
     "cross-env": "^7.0.2",
     "cz-conventional-changelog": "^3.2.0",
+    "eslint": "^7.4.0",
+    "eslint-config-prettier": "^6.11.0",
+    "eslint-plugin-unicorn": "^20.1.0",
     "husky": "4.2.5",
     "jest": "26.1.0",
+    "jest-runner-eslint": "^0.10.0",
+    "jest-watch-select-projects": "^2.0.0",
+    "jest-watch-typeahead": "^0.6.0",
     "lint-staged": "10.2.11",
     "prettier": "^2.0.5",
     "prettier-plugin-svelte": "^1.1.0",
diff --git a/test/config/jest.common.js b/test/config/jest.common.js
new file mode 100644
index 0000000..81e2c10
--- /dev/null
+++ b/test/config/jest.common.js
@@ -0,0 +1,13 @@
+const path = require('path');
+
+module.exports = {
+  rootDir: path.resolve(__dirname, '../..'),
+
+  roots: ['<rootDir>/lib', '<rootDir>/test', __dirname],
+
+  watchPlugins: [
+    'jest-watch-typeahead/filename',
+    'jest-watch-typeahead/testname',
+    'jest-watch-select-projects',
+  ],
+};
diff --git a/test/config/jest.lint.js b/test/config/jest.lint.js
new file mode 100644
index 0000000..7815ac4
--- /dev/null
+++ b/test/config/jest.lint.js
@@ -0,0 +1,11 @@
+const path = require('path');
+
+module.exports = {
+  ...require('./jest.common'),
+
+  displayName: 'lint',
+
+  runner: 'jest-runner-eslint',
+
+  testMatch: ['<rootDir>/lib/**/*.js'],
+};
diff --git a/test/config/jest.unit.js b/test/config/jest.unit.js
new file mode 100644
index 0000000..9d3efc0
--- /dev/null
+++ b/test/config/jest.unit.js
@@ -0,0 +1,9 @@
+module.exports = {
+  ...require('./jest.common'),
+
+  collectCoverageFrom: ['<rootDir>/lib/**/*.js'],
+
+  displayName: 'unit',
+
+  testMatch: ['<rootDir>/test/*.spec.js'],
+};