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

Author: greenkeeper[bot]

package.json

@@ -107,7 +107,7 @@
     "typescript": "^2.8.3",
     "uglifyjs-webpack-plugin": "^1.2.5",
     "webpack": "^4.9.1",
-    "webpack-cli": "^2.1.4",
+    "webpack-cli": "^3.0.0",
     "webpack-dev-server": "^3.1.4"
   }
 }