Bump RuboCop to 1.73.2

Author: issyl0

graphql-client.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "minitest", "~> 5.9"
   s.add_development_dependency "rake", "~> 13.2.1"
   s.add_development_dependency "rubocop-github"
-  s.add_development_dependency "rubocop", "~> 1.66.1"
+  s.add_development_dependency "rubocop", "~> 1.73.2"
 
   s.required_ruby_version = ">= 2.1.0"