Pass options through when using default serializer

lib/active_model/array_serializer.rb

@@ -83,7 +83,7 @@ module ActiveModel
           serializer = item.active_model_serializer
         end
 
-        serializable = serializer ? serializer.new(item, @options) : DefaultSerializer.new(item)
+        serializable = serializer ? serializer.new(item, @options) : DefaultSerializer.new(item, @options)
 
         if serializable.respond_to?(:serializable_hash)
           serializable.serializable_hash

lib/active_model/serializer.rb

@@ -504,7 +504,7 @@ module ActiveModel
     end
 
     def serializable_hash
-      @object.as_json
+      @object.as_json(@options)
     end
   end
 end