Merge pull request #2334 from sikachu/0-10-stable-relax-rails-version

Allow AMS to run on Rails < 6.1

Author: wasifhossain

active_model_serializers.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 2.1'
 
-  rails_versions = ['>= 4.1', '< 6']
+  rails_versions = ['>= 4.1', '< 6.1']
   spec.add_runtime_dependency 'activemodel', rails_versions
   # 'activesupport', rails_versions
   # 'builder'