Bumps [rubocop-rails](https://github.com/rubocop-hq/rubocop-rails) from 2.7.1 to 2.8.0.
- [Release notes](https://github.com/rubocop-hq/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop-rails/compare/v2.7.1...v2.8.0)
Signed-off-by: dependabot[bot] <support@github.com>
rubocop (>= 0.87)
rubocop-performance (1.7.1)
rubocop (>= 0.82.0)
- rubocop-rails (2.7.1)
+ rubocop-rails (2.8.0)
activesupport (>= 4.2.0)
rack (>= 1.1)
rubocop (>= 0.87.0)