remove webpack dep

Change-Id: I09b08531bc6da66628d7636cb599250b389a4c53

Author: samthor

lib/webpack.js

@@ -23,11 +23,10 @@
 module.exports = function(args) {
   const compile = require('../compile');
   const logger = require('../logger');
-  const ModuleFilenameHelpers = require('webpack/lib/ModuleFilenameHelpers');
   const RawSource = require('webpack-core/lib/RawSource');
   const SourceMapSource = require('webpack-core/lib/SourceMapSource');
 
-  args.test = args.test || /\.js($|\?)/i;
+  args.test = args.test ? new RegExp(args.test) : /\.js($|\?)/i;
 
   this.apply = function(compiler) {
     compiler.plugin('compilation', compilation => {
@@ -37,7 +36,7 @@ module.exports = function(args) {
 
       compilation.plugin('optimize-chunk-assets', (chunks, callback) => {
         chunks.forEach(chunk => {
-          const files = chunk.files.filter(name => ModuleFilenameHelpers.matchObject(args, name));
+          const files = chunk.files.filter(name => args.test.test(name));
           files.forEach(name => {
             const options = args.options;  // TODO