build(deps-dev): bump eslint-plugin-prettier from 4.0.0 to 4.2.1 (#496)

Bumps [eslint-plugin-prettier](https://github.com/prettier/eslint-plugin-prettier) from 4.0.0 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@v4.0.0...v4.2.1)

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

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