Don't check types & directives with custom reducer

The custom reducer might convert custom types
and directives, so we should not check them on input.
This should be done in the Schema subclass in this case.

Author: Cito

src/graphql/type/definition.py

@@ -417,7 +417,7 @@ class GraphQLField:
     """Definition of a GraphQL field"""
 
     type: "GraphQLOutputType"
-    args: Dict[str, "GraphQLArgument"]
+    args: GraphQLArgumentMap
     resolve: Optional["GraphQLFieldResolver"]
     subscribe: Optional["GraphQLFieldResolver"]
     description: Optional[str]

src/graphql/type/schema.py

@@ -113,16 +113,21 @@ def __init__(
             if types is None:
                 types = []
             else:
-                if not isinstance(types, AbstractSequence) or not all(
-                    is_named_type(type_) for type_ in types
+                if not isinstance(types, AbstractSequence) or (
+                    # if reducer has been overridden, don't check types
+                    self.type_map_reducer.__self__.__class__ is GraphQLSchema
+                    and not all(is_named_type(type_) for type_ in types)
                 ):
                     raise TypeError(
                         "Schema types must be specified as a sequence"
                         " of GraphQLNamedType instances."
                     )
             if directives is not None:
-                if not isinstance(directives, AbstractSequence) or not all(
-                    is_directive(directive) for directive in directives
+                # noinspection PyUnresolvedReferences
+                if not isinstance(directives, AbstractSequence) or (
+                    # if reducer has been overridden, don't check directive types
+                    self.type_map_directive_reducer.__self__.__class__ is GraphQLSchema
+                    and not all(is_directive(directive) for directive in directives)
                 ):
                     raise TypeError(
                         "Schema directives must be specified as a sequence"