chore(deps): update dependency webpack-cli to v3.3.7

Author: renovate-bot

package.json

@@ -41,7 +41,7 @@
     "wdio-spec-reporter": "0.1.5",
     "webdriverio": "4.14.4",
     "webpack": "4.33.0",
-    "webpack-cli": "3.3.4"
+    "webpack-cli": "3.3.7"
   },
   "files": [
     "lib/"