Build(deps-dev): Bump clean-css-cli from 5.6.1 to 5.6.2

Build(deps-dev): Bump clean-css-cli from 5.6.1 to 5.6.2

Bumps [clean-css-cli](https://github.com/clean-css/clean-css-cli) from 5.6.1 to 5.6.2.
- [Release notes](https://github.com/clean-css/clean-css-cli/releases)
- [Changelog](https://github.com/clean-css/clean-css-cli/blob/master/History.md)
- [Commits](https://github.com/clean-css/clean-css-cli/compare/v5.6.1...v5.6.2)

---
updated-dependencies:
- dependency-name: clean-css-cli
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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