build(deps-dev): bump webpack-cli from 3.3.12 to 4.2.0 in /html (#527)

Bumps [webpack-cli](https://github.com/webpack/webpack-cli) from 3.3.12 to 4.2.0.
- [Release notes](https://github.com/webpack/webpack-cli/releases)
- [Changelog](https://github.com/webpack/webpack-cli/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack/webpack-cli/compare/v3.3.12...webpack-cli@4.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

html/package.json

@@ -56,7 +56,7 @@
     "tslint-loader": "^3.5.4",
     "typescript": "^3.9.7",
     "webpack": "4.44.2",
-    "webpack-cli": "^3.3.12",
+    "webpack-cli": "^4.2.0",
     "webpack-dev-server": "^3.11.0",
     "webpack-merge": "^5.3.0"
   },