Bump rubocop-rails from 2.5.2 to 2.6.0
Bump rubocop-rails from 2.5.2 to 2.6.0

Bumps [rubocop-rails](https://github.com/rubocop-hq/rubocop-rails) from 2.5.2 to 2.6.0.
- [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/v2.5.2...v2.6.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
cesy/growstuff,Br3nda/growstuff,cesy/growstuff,Br3nda/growstuff,Br3nda/growstuff,Growstuff/growstuff,cesy/growstuff,Growstuff/growstuff,cesy/growstuff,Growstuff/growstuff,Growstuff/growstuff,Br3nda/growstuff