Use typing_extensions and mock for Python 3.7 Protocol support

connexion/middleware/abstract.py

@@ -3,6 +3,7 @@
 import pathlib
 import typing as t
 
+import typing_extensions as te
 from starlette.types import ASGIApp, Receive, Scope, Send
 
 from connexion.apis.abstract import AbstractSpecAPI
@@ -27,7 +28,7 @@ def add_api(
         pass
 
 
-class RoutedOperation(t.Protocol):
+class RoutedOperation(te.Protocol):
     def __init__(self, next_app: ASGIApp, **kwargs) -> None:
         ...
 

setup.py

@@ -28,6 +28,8 @@ def read_version(package):
     'werkzeug>=2.2.1,<3',
     'starlette>=0.15,<1',
     'httpx>=0.15,<1',
+    'typing-extensions>=4,<5',
+    'mock>=3,<4'
 ]
 
 swagger_ui_require = 'swagger-ui-bundle>=0.0.2,<0.1'