Reference chunk manifest internally

chunk-manifest-webpack-plugin now a dependency to inline-chunk-manifest-html-webpack-plugin.

Because the plugin practically is an extension of/for the result from chunk-manifest-webpack-plugin, it might as well be referenced internally instead of having to match the config between the two plugins.

Now webpack's chunk manifest can be inlined using the following config:

module.exports = {
  // your config values here
  plugins: [
    new HtmlWebpackPlugin({
        template: './index-template.ejs'
    }),
    new InlineChunkManifestHtmlWebpackPlugin() // no need to reference `new ChunkManifestPlugin()`
  ]
};