Fixed TypeError: Cannot read property 'properties' of undefined caused by webpack/webpack#8082

Author: jwtd

package.json

@@ -49,8 +49,8 @@
     "nodemon": "^1.18.3",
     "semantic-release": "^15.1.7",
     "standard": "^11.0.1",
-    "webpack": "^4.6.0",
-    "webpack-cli": "^2.0.14"
+    "webpack": "^4.20.2",
+    "webpack-cli": "^3.1.1"
   },
   "lint-staged": {
     "*.js": [