Update rubocop-minitest requirement from ~> 0.33.0 to ~> 0.34.2

Updates the requirements on [rubocop-minitest](https://github.com/rubocop/rubocop-minitest) to permit the latest version.
- [Release notes](https://github.com/rubocop/rubocop-minitest/releases)
- [Changelog](https://github.com/rubocop/rubocop-minitest/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-minitest@v0.33.0...v0.34.2)

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

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -12,7 +12,7 @@ group :development, :test do
   gem 'pry-byebug', '~> 3.9'
   gem 'rake', '~> 13.0', '>= 13.0.6'
   gem 'rubocop', '~> 1.7'
-  gem 'rubocop-minitest', '~> 0.33.0'
+  gem 'rubocop-minitest', '~> 0.34.2'
   gem 'rubocop-performance', '~> 1.12'
   gem 'rubocop-rake', '~> 0.6.0'
   gem 'simplecov', '~> 0.22.0'