Update webpack to fix known build issue

"Super expression must either be null or a function, not undefined"

Author: bor3ham

package.json

@@ -83,7 +83,7 @@
     "sass-loader": "^6.0.7",
     "style-loader": "^0.20.2",
     "url-loader": "^1.0.1",
-    "webpack": "4.20.2",
+    "webpack": "^4.41.2",
     "webpack-cli": "3.1.2"
   },
   "peerDependencies": {