Rake 11.1.1 fix JRuby issue.

ruby/rake#121

Revert "Revert "Safe to using rake 11.0.1 now.""

This reverts commit 82cbe66.

Author: Eric-Guo

active_model_serializers.gemspec

@@ -57,5 +57,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'minitest-reporters'
   spec.add_development_dependency 'grape', ['>= 0.13', '< 1.0']
   spec.add_development_dependency 'json_schema'
-  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rake', ['>= 10.0', '< 12.0']
 end