chore(deps-dev): bump postcss-selector-parser (#226)

Bumps [postcss-selector-parser](https://github.com/postcss/postcss-selector-parser) from 6.1.0 to 6.1.1.
- [Release notes](https://github.com/postcss/postcss-selector-parser/releases)
- [Changelog](https://github.com/postcss/postcss-selector-parser/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-selector-parser@v6.1.0...v6.1.1)

---
updated-dependencies:
- dependency-name: postcss-selector-parser
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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