Update dependency webpack-cli to v3.3.12

Author: renovate-bot

package-lock.json

@@ -40,7 +40,7 @@
     "script-ext-html-webpack-plugin": "2.1.4",
     "start-server-and-test": "1.11.0",
     "webpack": "4.43.0",
-    "webpack-cli": "3.3.11",
+    "webpack-cli": "3.3.12",
     "webpack-dev-server": "3.11.0"
   }
 }