Bump cssnano from 7.1.9 to 8.0.2

Bumps [cssnano](https://github.com/cssnano/cssnano) from 7.1.9 to 8.0.2.
- [Release notes](https://github.com/cssnano/cssnano/releases)
- [Commits](https://github.com/cssnano/cssnano/compare/cssnano@7.1.9...cssnano@8.0.2)

---
updated-dependencies:
- dependency-name: cssnano
  dependency-version: 8.0.2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]