adds missing requires for Object#duplicable?

actionpack/lib/action_dispatch/http/filter_parameters.rb

 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/hash/keys'
+require 'active_support/core_ext/object/duplicable'
 
 module ActionDispatch
   module Http

activerecord/lib/active_record/base.rb

@@ -13,6 +13,7 @@
 require 'active_support/core_ext/string/behavior'
 require 'active_support/core_ext/object/singleton_class'
 require 'active_support/core_ext/module/delegation'
+require 'active_support/core_ext/object/duplicable'
 require 'arel'
 require 'active_record/errors'
 

activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb

+require 'active_support/core_ext/object/duplicable'
+
 module ActiveRecord
   module ConnectionAdapters # :nodoc:
     module QueryCache

activeresource/lib/active_resource/base.rb

@@ -9,6 +9,7 @@
 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/object/misc'
 require 'active_support/core_ext/object/to_query'
+require 'active_support/core_ext/object/duplicable'
 require 'set'
 require 'uri'