feat: Use webpack 4 entries api to extract asset information

BREAKING CHANGES: Pass the entry point names to the custom sort function instead of chunk objects. Removed the alter`htmlWebpackPluginAlterChunks` hook. Changed the structure of the `assets` argument for all hooks.

Author: jantimon

README.md

@@ -289,10 +289,6 @@ plugins: [
 
 To allow other [plugins](https://github.com/webpack/docs/wiki/plugins) to alter the HTML this plugin executes the following events:
 
-#### `SyncWaterfallHook`
-
-* `htmlWebpackPluginAlterChunks`
-
 #### `AsyncSeriesWaterfallHook`
 
 * `htmlWebpackPluginBeforeHtmlGeneration`