Bump redis from 5.0.8 to 5.3.0

Bumps [redis](https://github.com/redis/redis-rb) from 5.0.8 to 5.3.0.
- [Changelog](https://github.com/redis/redis-rb/blob/master/CHANGELOG.md)
- [Commits](redis/redis-rb@v5.0.8...v5.3.0)

---
updated-dependencies:
- dependency-name: redis
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>