Maintenance: Bump redis from 4.6.0 to 4.7.0
Bumps [redis](https://github.com/redis/redis-rb) from 4.6.0 to 4.7.0.
- [Release notes](https://github.com/redis/redis-rb/releases)
- [Changelog](https://github.com/redis/redis-rb/blob/master/CHANGELOG.md)
- [Commits](https://github.com/redis/redis-rb/compare/v4.6.0...v4.7.0)