Update rubocop to latest version

Author: bastelfreak

openfact.gemspec

@@ -38,9 +38,9 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'ffi', '>= 1.15.5', '< 1.18.0', '!= 1.16.0', '!= 1.16.1', '!= 1.16.2'
   spec.add_development_dependency 'rake', '~> 13.0', '>= 13.0.6'
   spec.add_development_dependency 'rspec', '~> 3.0'
-  spec.add_development_dependency 'rubocop', '~> 1.28', '< 1.79'
-  spec.add_development_dependency 'rubocop-performance', '~> 1.5.2'
-  spec.add_development_dependency 'rubocop-rspec', '~> 2.10' # last version to support 2.5
+  spec.add_development_dependency 'rubocop', '~> 1.28', '< 1.85'
+  spec.add_development_dependency 'rubocop-performance', '~> 1.5'
+  spec.add_development_dependency 'rubocop-rspec', '>= 2.10', '< 4'
   spec.add_development_dependency 'simplecov', '~> 0.17'
   spec.add_development_dependency 'sys-filesystem', '~> 1.4'
   spec.add_development_dependency 'webmock', '~> 3.12'