Improve NoTypedChildren compat

Author: rmosolgo

lib/graphql/internal_representation/node.rb

@@ -12,8 +12,17 @@ class NoTypedChildren
         CHILDREN = [].freeze
         def dup; self; end
         def any?; false; end
+        def none?; true; end
         def [](key); CHILDREN; end
         def each; end
+        # Compatibility for when this was an Array:
+        def method_missing(method_name, *args, &block)
+          if CHILDREN.respond_to?(method_name)
+            CHILDREN.send(method_name, *args, &block)
+          else
+            raise NotImplementedError
+          end
+        end
       end
       NO_TYPED_CHILDREN = NoTypedChildren.new