ESM and CommonJS updates (#43)

* Add ESM module entry point to package
* Move `main` to `module` in package.json
* Generate commonjs output and set to `main`
* Sync package.json and package-lock.json
* Remove dead eslint global
* Remove rollup-plugin-node-resolve
* Output ESM file properly
* Use babel to support IE11
* Ignore dist folder during dev
* * Use `rollup-plugin-serve`
* Consolidate rollup watch and static server into `npm start`
* Update README to use `npm start`
* Add index.html file to support navigating to /examples using static server

Author: Mark Kennedy

.babelrc.js

@@ -1,3 +1,15 @@
 module.exports = {
-    presets: ['@babel/preset-typescript'],
+    presets: [
+        '@babel/preset-typescript',
+        [
+            '@babel/preset-env',
+            {
+                useBuiltIns: 'usage',
+                corejs: 3,
+                targets: {
+                    browsers: ['last 2 versions', 'ie >= 11'],
+                },
+            },
+        ],
+    ],
 };

.eslintrc.js

@@ -11,7 +11,4 @@ module.exports = {
         es6: true,
         mocha: true,
     },
-    globals: {
-        YT: true,
-    },
 };

.gitignore

@@ -7,4 +7,5 @@
 /node_modules
 *.log
 .coverage
-.rpt2_cache
+.rpt2_cache
+dist

README.md

@@ -145,26 +145,26 @@ The `scrollTo` method allows a set of options which are synonymous with the
 [ScrollToOptions](https://drafts.csswg.org/cssom-view/#dictdef-scrolltooptions) of the CSS specification,
 but some additional ones are provided by this library until supported natively.
 
-| Option     | Type   | Description  |
-| ---------- | ------ | -----------  |
-| `behavior` | String | The type of [scroll behavior](https://drafts.csswg.org/cssom-view/#enumdef-scrollbehavior) which can be set to `auto` or `smooth`. This is the recommended option since this is already natively supported. **If this is set, all other options are ignored**.                               |
+| Option     | Type   | Description                                                                                                                                                                                                                                                                                              |
+| ---------- | ------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `behavior` | String | The type of [scroll behavior](https://drafts.csswg.org/cssom-view/#enumdef-scrollbehavior) which can be set to `auto` or `smooth`. This is the recommended option since this is already natively supported. **If this is set, all other options are ignored**.                                           |
 | `duration` | Number | The number of milliseconds the scroll will take to complete                                                                                                                                                                                                                                              |
 | `easing`   | String | The easing to use when scrolling. Only keyword values of the [animation-timing-function](https://drafts.csswg.org/css-animations/#animation-timing-function) are supported. But passing function values will eventually be supported also (ie. `cubic-bezier(0.1, 0.7, 1.0, 0.1)`, `steps(4, end)`, etc) |
 
 ### scrollIntoView(element, [scroller], [options])
 
-| Option | Type | Description | 
-| ---------- | ----------------------- | ---------------------------- |
-| `element` | `HTMLElement` | The element to scroll into the viewport |
-| `scroller` | `HTMLElement` | The element to be scrolled (defaults to `document.body`) |
-| `options` | `ScrollIntoViewOptions` | A set of scroll options to scroll the element into view (see writeup below) (i.e. `{behavior: 'smooth', top: '20', left: '0''}`) |
+| Option     | Type                    | Description                                                                                                                      |
+| ---------- | ----------------------- | -------------------------------------------------------------------------------------------------------------------------------- |
+| `element`  | `HTMLElement`           | The element to scroll into the viewport                                                                                          |
+| `scroller` | `HTMLElement`           | The element to be scrolled (defaults to `document.body`)                                                                         |
+| `options`  | `ScrollIntoViewOptions` | A set of scroll options to scroll the element into view (see writeup below) (i.e. `{behavior: 'smooth', top: '20', left: '0''}`) |
 
 #### scrollIntoView Options
 
 A set of [ScrollIntoViewOptions](https://drafts.csswg.org/cssom-view/#dictdef-scrollintoviewoptions) can be passed to the `scrollIntoView` method.
 
-| Option     | Type   | Description |
-| ---------- | ------ | ---------------------------------------------------------------------------------------------------- |
+| Option     | Type   | Description                                                                                                                                            |
+| ---------- | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
 | `behavior` | String | The type of [scroll behavior](https://drafts.csswg.org/cssom-view/#enumdef-scrollbehavior) which can be set to `auto` or `smooth`. Defaults to `auto`. |
 
 ## Examples
@@ -173,7 +173,7 @@ Code samples showing how to use this package can be found in the [examples](exam
 and
 
 ```bash
-npm run start-server
+npm start
 ```
 
 Which will make the examples available at http://localhost:9383/examples/.

dist/scroll.d.ts

@@ -0,0 +1,14 @@
+<html lang="en-us">
+    <head>
+        <title>Examples</title>
+    </head>
+
+    <body>
+        <ul>
+            <li>
+                <a href="scroll-to-element.html">scroll-to-element.html</a>
+            </li>
+            <li><a href="vertical-scroll.html">vertical-scroll.html</a></li>
+        </ul>
+    </body>
+</html>