added hash to bundle chunk webpack for better cache handling

build/webpack.config.base.js

@@ -39,7 +39,7 @@ module.exports = {
     publicPath: '/themes/custom/materiotheme/assets/dist/',
     path: utils.resolve(themePath + '/assets/dist/'),
     filename: '[name].js',
-    chunkFilename: '[name].bundle.js'
+    chunkFilename: '[name].[chunkhash].bundle.js'
   },
   module: {
     rules: [