Bump stylelint from 11.1.1 to 12.0.0

Bumps [stylelint](https://github.com/stylelint/stylelint) from 11.1.1 to 12.0.0.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/stylelint/stylelint/compare/11.1.1...12.0.0

)

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