Update to Rails 7.1 support

Doug Edey · Doug Edey · commit affc3702380d · 2023-10-24T17:05:59.000-04:00
diff --git a/active_model_serializers.gemspec b/active_model_serializers.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 2.1'
 
-  rails_versions = ['>= 4.1', '< 7.1']
+  rails_versions = ['>= 4.1', '<= 7.1']
   spec.add_runtime_dependency 'activemodel', rails_versions
   # 'activesupport', rails_versions
   # 'builder'
