Update minitest requirement from ~> 5.22.0 to ~> 5.23.0 (#96)

Updates the requirements on [minitest](https://github.com/minitest/minitest) to permit the latest version.
- [Changelog](https://github.com/minitest/minitest/blob/master/History.rdoc)
- [Commits](minitest/minitest@v5.22.0...v5.23.0)

---
updated-dependencies:
- dependency-name: minitest
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -5,7 +5,7 @@ source 'https://rubygems.org'
 gemspec
 
 group :development do
-  gem 'minitest', '~> 5.22.0'
+  gem 'minitest', '~> 5.23.0'
   gem 'minitest-around', '~> 0.5.0'
   gem 'rake', '>= 10.0.0'
   gem 'rubocop', '~> 1.63.0'