chore(package): update webpack-cli to version 3.0.0

Author: greenkeeper[bot]

package.json

@@ -141,7 +141,7 @@
     "url-loader": "^1.0.1",
     "validate-commit-msg": "^2.12.2",
     "webpack": "^4.8.3",
-    "webpack-cli": "^2.1.3",
+    "webpack-cli": "^3.0.0",
     "webpack-dev-server": "^3.1.4"
   },
   "dependencies": {