Update dependency webpack-cli to v5

Author: renovate[bot]

package.json

@@ -38,7 +38,7 @@
   "devDependencies": {
     "progress-bar-webpack-plugin": "1.12.1",
     "webpack": "4.41.1",
-    "webpack-cli": "3.0.8",
+    "webpack-cli": "5.1.1",
     "worker-loader": "2.0.0"
   }
 }