Adds cache busting to js bundles as well

frontend/webpack.config.js

@@ -13,8 +13,8 @@ module.exports = {
 	},
 	output:    {
 		path:          path.resolve(__dirname, 'dist'),
-		filename:      'js/[name].bundle.js',
-		chunkFilename: 'js/[name].bundle.[id].js',
+		filename:      `js/[name].bundle.js?v=${PACKAGE.version}`,
+		chunkFilename: `js/[name].bundle.[id].js?v=${PACKAGE.version}`,
 		publicPath:    '/'
 	},
 	resolve:   {