build(deps-dev): bump css-minimizer-webpack-plugin in /html (#928)

Bumps [css-minimizer-webpack-plugin](https://github.com/webpack-contrib/css-minimizer-webpack-plugin) from 3.3.1 to 4.0.0.
- [Release notes](https://github.com/webpack-contrib/css-minimizer-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/css-minimizer-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/css-minimizer-webpack-plugin/compare/v3.3.1...v4.0.0)

---
updated-dependencies:
- dependency-name: css-minimizer-webpack-plugin
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

html/package.json

@@ -20,7 +20,7 @@
   "devDependencies": {
     "copy-webpack-plugin": "^11.0.0",
     "css-loader": "^6.7.1",
-    "css-minimizer-webpack-plugin": "^3.3.1",
+    "css-minimizer-webpack-plugin": "^4.0.0",
     "gts": "^1.1.2",
     "gulp": "^4.0.2",
     "gulp-clean": "^0.4.0",