Update rubocop-minitest requirement from ~> 0.29.0 to ~> 0.34.5

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@v0.29.0...v0.34.5)

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

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

oxidized-web.gemspec

@@ -32,7 +32,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rails_best_practices', '~> 1.19'
   s.add_development_dependency 'rake',                 '~> 13.0'
   s.add_development_dependency 'rubocop',              '~> 1.48.0'
-  s.add_development_dependency 'rubocop-minitest',     '~> 0.29.0'
+  s.add_development_dependency 'rubocop-minitest',     '~> 0.34.5'
   s.add_development_dependency 'rubocop-rake',         '~> 0.6.0'
   s.add_development_dependency 'rubocop-rails',        '~> 2.19.1'
   s.add_development_dependency 'simplecov',            '~> 0.22.0'