Use custom dedent function and pin graphql-core to >3.1.2

graphene/relay/tests/test_node.py

@@ -1,7 +1,7 @@
 import re
 from graphql_relay import to_global_id
 
-from graphql.pyutils import dedent
+from graphene.tests.utils import dedent
 
 from ...types import ObjectType, Schema, String
 from ..node import Node, is_node

graphene/relay/tests/test_node_custom.py

@@ -1,5 +1,6 @@
 from graphql import graphql_sync
-from graphql.pyutils import dedent
+
+from graphene.tests.utils import dedent
 
 from ...types import Interface, ObjectType, Schema
 from ...types.scalars import Int, String

graphene/tests/utils.py

@@ -0,0 +1,9 @@
+from textwrap import dedent as _dedent
+
+
+def dedent(text: str) -> str:
+    """Fix indentation of given text by removing leading spaces and tabs.
+    Also removes leading newlines and trailing spaces and tabs, but keeps trailing
+    newlines.
+    """
+    return _dedent(text.lstrip("\n").rstrip(" \t"))

graphene/types/tests/test_schema.py

@@ -1,7 +1,7 @@
+from graphql.type import GraphQLObjectType, GraphQLSchema
 from pytest import raises
 
-from graphql.type import GraphQLObjectType, GraphQLSchema
-from graphql.pyutils import dedent
+from graphene.tests.utils import dedent
 
 from ..field import Field
 from ..objecttype import ObjectType

setup.py

@@ -82,7 +82,7 @@ setup(
     keywords="api graphql protocol rest relay graphene",
     packages=find_packages(exclude=["examples*"]),
     install_requires=[
-        "graphql-core>=3.1.1,<4",
+        "graphql-core>=3.1.2,<4",
         "graphql-relay>=3.0,<4",
         "aniso8601>=8,<9",
     ],