Prepare Brotli-compressed versions of assets to serve them with Content-Encoding: br

This plugin compresses assets with Brotli compression algorithm using zlib, iltorb or brotli.js libraries for serving it with ngx_brotli or such.
```
npm install --save-dev brotli-webpack-plugin
` javascript`
var BrotliPlugin = require('brotli-webpack-plugin');
module.exports = {
plugins: [
new BrotliPlugin({
asset: '[path].br[query]',
test: /\.(js|css|html|svg)$/,
threshold: 10240,
minRatio: 0.8
})
]
}
Arguments:
* asset: The target asset name. Defaults to '[path].br[query]'.[file]
* is replaced with the original asset file name.[fileWithoutExt]
* is replaced with the file name minus its extension, e.g. the style of style.css.[ext]
* is replaced with the file name extension, e.g. the css of style.css.[path]
* is replaced with the path of the original asset.[query]
* is replaced with the query.test
* : All assets matching this RegExp are processed. Defaults to every asset.threshold
* : Only assets bigger than this size (in bytes) are processed. Defaults to 0.minRatio
* : Only assets that compress better that this ratio are processed. Defaults to 0.8.deleteOriginalAssets
* : remove original files that were compressed with brotli. Default: false
Optional arguments for Brotli (see iltorb doc for details):
* mode: Default: 0,quality
* : Default: 11,lgwin
* : Default: 22,lgblock
* : Default: 0,size_hint
* : Default: 0,disable_literal_context_modeling`: Default: false
*
Heavily copy-pasted from webpack/compression-webpack-plugin by Tobias Koppers.
Licensed under MIT.