fix(package): update webpack-cli to version 3.0.0 (#212)

Author: greenkeeper[bot]

package.json

@@ -78,7 +78,7 @@
     "url-loader": "^1.0.0",
     "webpack": "^4.0.0",
     "webpack-bundle-analyzer": "^2.9.2",
-    "webpack-cli": "^2.0.13",
+    "webpack-cli": "^3.0.0",
     "webpack-visualizer-plugin": "^0.1.11"
   },
   "devDependencies": {