Bump webpack-cli from 3.3.11 to 3.3.12 in /token/js (#116)

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.11 to 3.3.12.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/v3.3.12/CHANGELOG.md)
- [Commits](webpack/webpack-cli@v3.3.11...v3.3.12)

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Author: dependabot[bot]

token/js/package-lock.json

@@ -72,7 +72,7 @@
     "superstruct": "^0.10.12",
     "watch": "^1.0.2",
     "webpack": "^4.20.2",
-    "webpack-cli": "^3.1.1",
+    "webpack-cli": "^3.3.12",
     "webpack-dev-server": "^3.11.0"
   },
   "engines": {