Upgrade: Bump eslint from 7.3.1 to 7.4.0 (#124)

Bumps [eslint](https://github.com/eslint/eslint) from 7.3.1 to 7.4.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v7.3.1...v7.4.0)

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