Bump mock_redis from 0.36.0 to 0.39.0

Bumps [mock_redis](https://github.com/sds/mock_redis) from 0.36.0 to 0.39.0.
- [Release notes](https://github.com/sds/mock_redis/releases)
- [Changelog](https://github.com/sds/mock_redis/blob/main/CHANGELOG.md)
- [Commits](sds/mock_redis@v0.36.0...v0.39.0)

---
updated-dependencies:
- dependency-name: mock_redis
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -41,8 +41,7 @@ GEM
       rb-inotify (~> 0.9, >= 0.9.10)
     lumberjack (1.2.8)
     method_source (1.0.0)
-    mock_redis (0.36.0)
-      ruby2_keywords
+    mock_redis (0.39.0)
     mocktail (1.2.2)
     nenv (0.3.0)
     notiffany (0.1.3)
@@ -98,7 +97,6 @@ GEM
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
     ruby-progressbar (1.13.0)
-    ruby2_keywords (0.0.5)
     shellany (0.0.1)
     simplecov (0.22.0)
       docile (~> 1.1)