Update dependency webpack to v5

Author: renovate-bot

package.json

@@ -28,7 +28,7 @@
     "node-sass": "4.14.1",
     "sass-loader": "8.0.2",
     "style-loader": "1.2.1",
-    "webpack": "4.43.0",
+    "webpack": "5.34.0",
     "webpack-cli": "3.3.11",
     "webpack-dev-server": "3.11.0"
   },