chore: Bump predis/predis from 2.1.1 to 2.2.1

Bumps [predis/predis](https://github.com/predis/predis) from 2.1.1 to 2.2.1.
- [Release notes](https://github.com/predis/predis/releases)
- [Changelog](https://github.com/predis/predis/blob/v2.x/CHANGELOG.md)
- [Commits](predis/predis@v2.1.1...v2.2.1)

---
updated-dependencies:
- dependency-name: predis/predis
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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