Added support for graphql-core 3 (stable) (#47)

Changes include:
* Modified an error class to be more compatible
* Added typing_extensions req

graphene_tornado/tornado_graphql_handler.py

@@ -18,12 +18,11 @@
 from graphql import OperationType
 from graphql import parse
 from graphql import validate
-from graphql.error import format_error as format_graphql_error
+from graphql.error import GraphQLFormattedError  as format_graphql_error
 from graphql.error.graphql_error import GraphQLError
 from graphql.error.syntax_error import GraphQLSyntaxError
 from graphql.execution.execute import ExecutionResult
 from graphql.pyutils import is_awaitable
-from mypy_extensions import TypedDict
 from tornado import web
 from tornado.escape import json_encode
 from tornado.escape import to_unicode

requirements-test.txt

@@ -5,4 +5,4 @@ mypy==0.770
 pre-commit==2.2.0
 pytest==4.4.1
 pytest-cov==2.6.1
-pytest-tornado==0.8.0
+pytest-tornado==0.8.1

requirements.txt

@@ -1,11 +1,12 @@
 six>=1.10.0
 json-stable-stringify-python==0.2
-graphene>=3.0b1
+graphene>=3.0
 Jinja2>=2.10.1, <2.11.0
 opencensus>=0.7.7
 protobuf>=3.7.1
 snapshottest==0.5.1
-tornado>=5.1.0
+tornado>=6.1.0, <7.0
 tornado-retry-client==0.6.1
 tox
-werkzeug==0.15.3
+werkzeug
+typing_extensions

setup.py

@@ -13,7 +13,7 @@
     'mock',
     'pytest>=4.4.1',
     'pytest-cov>=2.6.1',
-    'pytest-tornado>=0.7.0',
+    'pytest-tornado>=0.8.1',
     'tox'
 ]
 
@@ -32,17 +32,14 @@
     license='MIT',
 
     classifiers=[
-        'Development Status :: 3 - Alpha',
+        'Development Status :: 3 - Beta',
         'Intended Audience :: Developers',
         'Topic :: Software Development :: Libraries',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: Implementation :: PyPy',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10'
     ],
 
     keywords='api graphql protocol rest relay graphene',
@@ -51,10 +48,11 @@
 
     install_requires=[
         'six>=1.10.0',
-        'graphene>=3.0b1',
+        'graphene>=3.0',
         'Jinja2>=2.10.1',
-        'tornado>=5.1.0',
-        'werkzeug==0.12.2'
+        'tornado>=6.1.0, <7.0',
+        'werkzeug',
+        'typing_extensions'
     ],
     setup_requires=[
         'pytest',