Fix prod build

Author: cloakedninjas

package.json

@@ -1,6 +1,6 @@
 {
   "name": "phaser3-typescript-boilerplate",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "",
   "main": "index.js",
   "scripts": {

webpack-dist.config.js

@@ -23,9 +23,11 @@ module.exports = {
     path: DIST_DIR,
   },
   plugins: [
-    new CopyPlugin([
-      {from: 'src/index.html', to: DIST_DIR},
-      {from: 'assets', to: DIST_DIR + '/assets'},
-    ]),
+    new CopyPlugin({
+      patterns: [
+        {from: 'src/index.html', to: DIST_DIR},
+        {from: 'assets', to: DIST_DIR + '/assets'},
+      ],
+    }),
   ],
 };