Bump redis from 3.5.3 to 4.4.4

Bumps [redis](https://github.com/redis/redis-py) from 3.5.3 to 4.4.4.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](redis/redis-py@3.5.3...v4.4.4)

---
updated-dependencies:
- dependency-name: redis
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -68,7 +68,7 @@ pyparsing==2.4.7
 python-dateutil==2.8.2
 python-http-client==3.3.3
 pytz==2021.3
-redis==3.5.3
+redis==4.4.4
 requests[security] == 2.25.1
 requests-cache==0.6.3
 requests-oauthlib==1.3.0