Merge branch 'master' into tgriesser/feat/894-context-lifecycle-subscription

* master: (211 commits)
  Update deps (graphql#2844)
  resources: use named groups in RegExp (graphql#2840)
  TS: exclude integration tests from root tsconfig.json (graphql#2838)
  Flow: remove support for measuring Flow coverage (graphql#2837)
  CI: test on node 15 (graphql#2836)
  Update deps (graphql#2835)
  build: add support for experimental releases (graphql#2831)
  15.4.0
  Update deps (graphql#2827)
  Update deps (graphql#2825)
  integrationTests: add Flow test (graphql#2819)
  fix: ensure variance of types matches how values are used (graphql#2786)
  Cleanup '__fixtures__' leftovers (graphql#2818)
  Convert fixtures to be JS files (graphql#2816)
  Update deps (graphql#2815)
  benchmark: extract benchmarks into separate folder and run them on NPM package
  Update deps (graphql#2810)
  Update outdated documentation (graphql#2806)
  Make print() break arguments over multiple lines (graphql#2797)
  Added check for specific symbols in polyfills/symbols (graphql#2804)
  ...

Author: tgriesser

.babelrc-deno.json

@@ -0,0 +1,13 @@
+{
+  "plugins": [
+    "@babel/plugin-transform-flow-strip-types",
+    ["./resources/add-extension-to-import-paths", { "extension": "js" }],
+    "./resources/inline-invariant"
+  ],
+  "overrides": [
+    {
+      "include": "src/error/GraphQLError.js",
+      "plugins": [["@babel/plugin-transform-classes", { "loose": false }]]
+    }
+  ]
+}

.babelrc.json

@@ -1,12 +1,9 @@
 {
   "presets": [["@babel/preset-env", { "targets": { "node": "current" } }]],
-  "plugins": [
-    "./resources/inline-invariant",
-    "@babel/plugin-transform-flow-strip-types"
-  ],
+  "plugins": ["@babel/plugin-transform-flow-strip-types"],
   "overrides": [
     {
-      "exclude": ["**/__tests__/**/*", "**/__fixtures__/**/*"],
+      "exclude": ["src/__testUtils__/**/*", "**/__tests__/**/*"],
       "presets": ["@babel/preset-env"],
       "plugins": [
         ["@babel/plugin-transform-classes", { "loose": true }],
@@ -16,11 +13,24 @@
       ],
       "env": {
         "cjs": {
-          "presets": [["@babel/preset-env", { "modules": "commonjs" }]]
+          "presets": [["@babel/preset-env", { "modules": "commonjs" }]],
+          "plugins": [
+            [
+              "./resources/add-extension-to-import-paths",
+              { "extension": "js" }
+            ],
+            "./resources/inline-invariant"
+          ]
         },
         "mjs": {
           "presets": [["@babel/preset-env", { "modules": false }]],
-          "plugins": ["./resources/add-extension-to-import-paths"]
+          "plugins": [
+            [
+              "./resources/add-extension-to-import-paths",
+              { "extension": "mjs" }
+            ],
+            "./resources/inline-invariant"
+          ]
         }
       }
     },

.eslintignore

@@ -0,0 +1,13 @@
+# Copied from '.gitignore', please keep it in sync.
+/.eslintcache
+/node_modules
+/coverage
+/npmDist
+/denoDist
+/npm
+/deno
+
+# Ignore Flow typings for 3rd-party libraries
+/flow-typed
+# Ignore TS files inside integration test
+/integrationTests/ts/*.ts