Update dependency webpack-cli to ^3.3.12

Signed-off-by: Renovate Bot <bot@renovateapp.com>

Author: renovate-bot

package-lock.json

@@ -54,7 +54,7 @@
     "eslint-plugin-jsx-a11y": "^6.2.3",
     "eslint-plugin-react": "^7.20.0",
     "prop-types": "^15.7.2",
-    "webpack-cli": "^3.3.11"
+    "webpack-cli": "^3.3.12"
   },
   "peerDependencies": {
     "react": "^16.13.1",