chore(deps): update dependency webpack-dev-server to v3.5.1

Author: renovate-bot

package.json

@@ -103,7 +103,7 @@
     "typescript": "3.5.1",
     "webpack": "4.32.2",
     "webpack-cli": "3.3.2",
-    "webpack-dev-server": "3.4.1",
+    "webpack-dev-server": "3.5.1",
     "webpack-merge": "4.2.1",
     "workbox-webpack-plugin": "4.3.1"
   }