rack-graphql.gemspec in rack-graphql-2.5.1 vs rack-graphql.gemspec in rack-graphql-2.6.0

- old
+ new

@@ -34,8 +34,8 @@
   spec.add_development_dependency 'pry'
   spec.add_development_dependency 'rack-test'
   spec.add_development_dependency 'rake'
   spec.add_development_dependency 'rspec'
   spec.add_development_dependency 'rubocop'
-  spec.add_development_dependency 'rubocop-performance'
+  spec.add_development_dependency 'rubocop-rake'
   spec.add_development_dependency 'rubocop-rspec'
 end