build(deps): bump rubocop from 1.5.1 to 1.7.0 in /Library/Homebrew

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 1.5.1 to 1.7.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop/compare/v1.5.1...v1.7.0

)

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