Bump nth-check, cheerio and list-stylesheets

Bumps [nth-check](https://github.com/fb55/nth-check) to 2.1.1 and updates ancestor dependencies [nth-check](https://github.com/fb55/nth-check), [cheerio](https://github.com/cheeriojs/cheerio) and [list-stylesheets](https://github.com/jonkemp/inline-css). These dependencies need to be updated together.


Updates `nth-check` from 1.0.2 to 2.1.1
- [Release notes](https://github.com/fb55/nth-check/releases)
- [Commits](fb55/nth-check@v1.0.2...v2.1.1)

Updates `cheerio` from 1.0.0-rc.10 to 1.1.2
- [Release notes](https://github.com/cheeriojs/cheerio/releases)
- [Commits](cheeriojs/cheerio@v1.0.0-rc.10...v1.1.2)

Updates `list-stylesheets` from 1.2.9 to 1.2.9
- [Release notes](https://github.com/jonkemp/inline-css/releases)
- [Commits](https://github.com/jonkemp/inline-css/compare/list-stylesheets@1.2.9...list-stylesheets@1.2.9)

---
updated-dependencies:
- dependency-name: nth-check
  dependency-version: 2.1.1
  dependency-type: indirect
- dependency-name: cheerio
  dependency-version: 1.1.2
  dependency-type: indirect
- dependency-name: list-stylesheets
  dependency-version: 1.2.9
  dependency-type: direct:production
...

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Author: dependabot[bot]