chore(deps): update dependency rubocop-rspec to v3 (#276)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

ruby/cucumber-messages.gemspec

@@ -29,7 +29,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rubocop', '~> 1.71.0'
   s.add_development_dependency 'rubocop-performance', '~> 1.23.0'
   s.add_development_dependency 'rubocop-rake', '~> 0.6.0'
-  s.add_development_dependency 'rubocop-rspec', '~> 2.31.0'
+  s.add_development_dependency 'rubocop-rspec', '~> 3.4.0'
 
   s.files            = Dir['README.md', 'LICENSE', 'VERSION', 'lib/**/*']
   s.rdoc_options     = ['--charset=UTF-8']