build: bump parallel_tests from 2.29.2 to 2.30.0 in /Library/Homebrew

Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 2.29.2 to 2.30.0.
- [Release notes](https://github.com/grosser/parallel_tests/releases)
- [Commits](https://github.com/grosser/parallel_tests/compare/v2.29.2...v2.30.0

)

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

Library/Homebrew/Gemfile.lock

@@ -49,7 +49,7 @@ GEM
       mini_portile2 (~> 2.4.0)
     ntlm-http (0.1.1)
     parallel (1.19.1)
-    parallel_tests (2.29.2)
+    parallel_tests (2.30.0)
       parallel
     parser (2.6.5.0)
       ast (~> 2.4.0)