Bump redis from 4.3.1 to 4.4.0

Bumps [redis](https://github.com/redis/redis-rb) from 4.3.1 to 4.4.0.
- [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/v4.3.1...v4.4.0)

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

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

Gemfile.lock

@@ -494,7 +494,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.5.1)
-    redis (4.3.1)
+    redis (4.4.0)
     regexp_parser (2.1.1)
     request_store (1.5.0)
       rack (>= 1.4)