Bump minitest from 5.14.3 to 5.14.4

Bumps [minitest](https://github.com/seattlerb/minitest) from 5.14.3 to 5.14.4.
- [Release notes](https://github.com/seattlerb/minitest/releases)
- [Changelog](https://github.com/seattlerb/minitest/blob/master/History.rdoc)
- [Commits](minitest/minitest@v5.14.3...v5.14.4)

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

Gemfile.lock

@@ -9,7 +9,7 @@ GEM
     ast (2.4.1)
     coderay (1.1.3)
     method_source (1.0.0)
-    minitest (5.14.3)
+    minitest (5.14.4)
     parallel (1.19.2)
     parser (2.7.1.4)
       ast (~> 2.4.1)