chore: update webpack 4 version

Author: kisenka

env/webpack-4/package.json

@@ -5,7 +5,7 @@
     "file-loader": "1.1.10",
     "html-loader": "^0.4.5",
     "html-webpack-plugin": "^3.0.6",
-    "webpack": "^4.1.1"
+    "webpack": "^4.43.0"
   },
   "packagesToLink": [
     "enhanced-resolve",