Merge pull request #232 from textpattern/greenkeeper/webpack-cli-2.1.5

Update webpack-cli to the latest version 🚀

Author: philwareham

package.json

@@ -40,7 +40,7 @@
     "stylelint-scss": "3.1.0",
     "stylelint-webpack-plugin": "0.10.5",
     "webpack": "4.10.2",
-    "webpack-cli": "2.1.4"
+    "webpack-cli": "2.1.5"
   },
   "browserslist": [
     "> 0.5%",