Update eslint requirement from 6.2.2 to 6.3.0
Updates the requirements on [eslint](https://github.com/eslint/eslint) to permit the latest version.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v6.2.2...v6.3.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
authored by