Bump redis from 5.0.6 to 5.0.7 (#521)

Bumps [redis](https://github.com/redis/redis-rb) from 5.0.6 to 5.0.7.
- [Changelog](https://github.com/redis/redis-rb/blob/master/CHANGELOG.md)
- [Commits](redis/redis-rb@v5.0.6...v5.0.7)

---
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>

Gemfile.lock

@@ -27,7 +27,7 @@ GEM
     rack-test (2.1.0)
       rack (>= 1.3)
     rainbow (3.1.1)
-    redis (5.0.6)
+    redis (5.0.7)
       redis-client (>= 0.9.0)
     redis-client (0.15.0)
       connection_pool