Bump redis-client from 0.19.1 to 0.20.0

Bumps [redis-client](https://github.com/redis-rb/redis-client) from 0.19.1 to 0.20.0.
- [Changelog](https://github.com/redis-rb/redis-client/blob/master/CHANGELOG.md)
- [Commits](redis-rb/redis-client@v0.19.1...v0.20.0)

---
updated-dependencies:
- dependency-name: redis-client
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -237,7 +237,7 @@ GEM
       psych (>= 4.0.0)
     redis (5.1.0)
       redis-client (>= 0.17.0)
-    redis-client (0.19.1)
+    redis-client (0.20.0)
       connection_pool
     reline (0.4.2)
       io-console (~> 0.5)