chore(deps-dev): update minitest requirement from = 5.15.0 to = 5.25.2

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@v5.15.0...v5.25.2)

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

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

influxdb-client.gemspec

@@ -46,7 +46,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency 'csv'
   spec.add_development_dependency 'bundler', '~> 2.0'
-  spec.add_development_dependency 'minitest', '5.15.0'
+  spec.add_development_dependency 'minitest', '5.25.2'
   spec.add_development_dependency 'minitest-reporters', '~> 1.4'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rubocop', '~> 0.66.0'