build(deps): bump rubocop from 1.2.0 to 1.3.0 in /Library/Homebrew

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 1.2.0 to 1.3.0.
- [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/v1.2.0...v1.3.0)

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