Update dependency webpack-dev-server to v4

Author: renovate-bot

e2e/package.json

@@ -35,6 +35,6 @@
     "typescript": "4.3.4",
     "webpack": "5.41.1",
     "webpack-cli": "4.7.2",
-    "webpack-dev-server": "3.10.1"
+    "webpack-dev-server": "4.7.0"
   }
 }