feat(index): upgrade config-css

BREAKING CHANGE: requires latest Webpack

Author: niieani

src/index.ts

@@ -13,4 +13,5 @@ const ExtractTextPlugin = require('extract-text-webpack-plugin')
 export = function less({ filename = '[name].css', allChunks = false, sourceMap = false, extractText = undefined, resolveRelativeUrl = undefined, additionalLoaders = [] } = {}) {
   additionalLoaders.push(`less${sourceMap ? '?sourceMap' : ''}`)
   return easyCss({ test: /\.less$/i, filename, allChunks, extractText, resolveRelativeUrl, sourceMap, additionalLoaders })
-}
+}
+