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

Author: greenkeeper[bot]

package.json

@@ -168,7 +168,7 @@
     "uglifyjs-webpack-plugin": "^1.1.6",
     "url-loader": "^1.0.1",
     "webpack": "^4.7.0",
-    "webpack-cli": "^2.1.2",
+    "webpack-cli": "^3.0.0",
     "webpack-dev-middleware": "^3.1.3",
     "webpack-hot-middleware": "^2.17.0",
     "webpack-isomorphic-tools": "^3.0.2"