Bump flatted and eslint in /test/fixture/v7.0.x

Bumps [flatted](https://github.com/WebReflection/flatted) to 3.4.2 and updates ancestor dependency [eslint](https://github.com/eslint/eslint). These dependencies need to be updated together.


Updates `flatted` from 2.0.2 to 3.4.2
- [Commits](WebReflection/flatted@v2.0.2...v3.4.2)

Updates `eslint` from 7.0.0 to 7.32.0
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/v7.32.0/CHANGELOG.md)
- [Commits](eslint/eslint@v7.0.0...v7.32.0)

---
updated-dependencies:
- dependency-name: flatted
  dependency-version: 3.4.2
  dependency-type: indirect
- dependency-name: eslint
  dependency-version: 7.32.0
  dependency-type: direct:production
...

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Author: dependabot[bot]