Bump rspec-expectations from 3.8.0 to 3.8.1 in /Library/Homebrew/test

Bumps [rspec-expectations](https://github.com/rspec/rspec-expectations) from 3.8.0 to 3.8.1.
- [Release notes](https://github.com/rspec/rspec-expectations/releases)
- [Changelog](https://github.com/rspec/rspec-expectations/blob/master/Changelog.md)
- [Commits](https://github.com/rspec/rspec-expectations/compare/v3.8.0...v3.8.1

)

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

Library/Homebrew/test/Gemfile.lock

@@ -23,7 +23,7 @@ GEM
       rspec-mocks (~> 3.8.0)
     rspec-core (3.8.0)
       rspec-support (~> 3.8.0)
-    rspec-expectations (3.8.0)
+    rspec-expectations (3.8.1)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-its (1.2.0)