Bump minitest from 5.25.1 to 5.25.4

Bumps [minitest](https://github.com/minitest/minitest) from 5.25.1 to 5.25.4.
- [Changelog](https://github.com/minitest/minitest/blob/master/History.rdoc)
- [Commits](minitest/minitest@v5.25.1...v5.25.4)

---
updated-dependencies:
- dependency-name: minitest
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -33,7 +33,7 @@ GEM
     memoizable (0.4.2)
       thread_safe (~> 0.3, >= 0.3.1)
     mini_i18n (0.9.0)
-    minitest (5.25.1)
+    minitest (5.25.4)
     multipart-post (2.3.0)
     naught (1.1.0)
     oauth (1.1.0)