Bump redis from 5.1.0 to 5.2.0 (#660)

Bumps [redis](https://github.com/redis/redis-rb) from 5.1.0 to 5.2.0.
- [Changelog](https://github.com/redis/redis-rb/blob/master/CHANGELOG.md)
- [Commits](https://github.com/redis/redis-rb/compare/v5.1.0...v5.2.0)

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

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

Gemfile.lock

@@ -309,9 +309,9 @@ GEM
       ffi (~> 1.0)
     rdoc (6.6.3.1)
       psych (>= 4.0.0)
-    redis (5.1.0)
-      redis-client (>= 0.17.0)
-    redis-client (0.19.1)
+    redis (5.2.0)
+      redis-client (>= 0.22.0)
+    redis-client (0.22.1)
       connection_pool
     regexp_parser (2.9.0)
     reline (0.5.1)