build(deps-dev): bump eslint-plugin-prettier from 4.1.0 to 4.2.1

Bumps [eslint-plugin-prettier](https://github.com/prettier/eslint-plugin-prettier) from 4.1.0 to 4.2.1.
- [Release notes](https://github.com/prettier/eslint-plugin-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-plugin-prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/eslint-plugin-prettier@v4.1.0...v4.2.1)

---
updated-dependencies:
- dependency-name: eslint-plugin-prettier
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]