Bump redis-namespace from 1.8.1 to 1.11.0

Bumps [redis-namespace](https://github.com/resque/redis-namespace) from 1.8.1 to 1.11.0.
- [Release notes](https://github.com/resque/redis-namespace/releases)
- [Changelog](https://github.com/resque/redis-namespace/blob/master/CHANGELOG.md)
- [Commits](resque/redis-namespace@v1.8.1...v1.11.0)

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

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

Gemfile.lock

@@ -193,8 +193,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redis (4.4.0)
-    redis-namespace (1.8.1)
-      redis (>= 3.0.4)
+    redis-namespace (1.11.0)
+      redis (>= 4)
     regexp_parser (2.1.1)
     responders (3.0.1)
       actionpack (>= 5.0)