Bump redis from 4.5.0 to 4.5.1 (#824)

Bumps [redis](https://github.com/redis/redis-py) from 4.5.0 to 4.5.1.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](redis/redis-py@v4.5.0...v4.5.1)

---
updated-dependencies:
- dependency-name: redis
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -10,5 +10,5 @@ pytest-aiohttp==1.0.4
 pytest-cov==4.0.0
 pytest-mock==3.10.0
 pytest-sugar==0.9.6
-redis==4.5.0
+redis==4.5.1
 yarl==1.8.2