Bump css-what and cheerio (#731)

Bumps [css-what](https://github.com/fb55/css-what) and [cheerio](https://github.com/cheeriojs/cheerio). These dependencies needed to be updated together.

Updates `css-what` from 4.0.0 to 6.1.0
- [Release notes](https://github.com/fb55/css-what/releases)
- [Commits](fb55/css-what@v4.0.0...v6.1.0)

Updates `cheerio` from 1.0.0-rc.5 to 1.0.0-rc.12
- [Release notes](https://github.com/cheeriojs/cheerio/releases)
- [Changelog](https://github.com/cheeriojs/cheerio/blob/main/History.md)
- [Commits](cheeriojs/cheerio@v1.0.0-rc.5...v1.0.0-rc.12)

---
updated-dependencies:
- dependency-name: css-what
  dependency-type: indirect
- dependency-name: cheerio
  dependency-type: indirect
...

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Author: dependabot[bot]