build(deps): bump rubocop from 1.14.0 to 1.15.0 in /Library/Homebrew

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.14.0 to 1.15.0.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop/compare/v1.14.0...v1.15.0

)

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

Library/Homebrew/Gemfile.lock

@@ -109,7 +109,7 @@ GEM
     rspec-support (3.10.2)
     rspec-wait (0.0.9)
       rspec (>= 3, < 4)
-    rubocop (1.14.0)
+    rubocop (1.15.0)
       parallel (~> 1.10)
       parser (>= 3.0.0.0)
       rainbow (>= 2.2.2, < 4.0)