Update rubocop-minitest requirement from ~> 0.31.0 to ~> 0.32.2

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@v0.31.0...v0.32.2)

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

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

gir_ffi-tracker.gemspec

@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "rake-manifest", "~> 0.2.0"
   spec.add_development_dependency "rubocop", "~> 1.51"
-  spec.add_development_dependency "rubocop-minitest", "~> 0.31.0"
+  spec.add_development_dependency "rubocop-minitest", "~> 0.32.2"
   spec.add_development_dependency "rubocop-packaging", "~> 0.5.0"
   spec.add_development_dependency "rubocop-performance", "~> 1.18"
   spec.add_development_dependency "simplecov", "~> 0.22.0"