chore(deps-dev): bump eslint from 6.2.1 to 6.2.2 in /core

Bumps [eslint](https://github.com/eslint/eslint) from 6.2.1 to 6.2.2.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](eslint/eslint@v6.2.1...v6.2.2)

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