Bump eslint from 6.2.2 to 6.8.0 (#37)

Bumps [eslint](https://github.com/eslint/eslint) from 6.2.2 to 6.8.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v6.2.2...v6.8.0)

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