chore(deps): update dependency webpack-cli to v3.3.12 (#636)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package-lock.json

@@ -84,7 +84,7 @@
     "vue-loader": "15.9.2",
     "vuepress": "1.5.0",
     "webpack": "4.43.0",
-    "webpack-cli": "3.3.11",
+    "webpack-cli": "3.3.12",
     "webpack-dev-server": "3.11.0",
     "webpack-merge": "4.2.2"
   },