chore: require typing extension as dependency

falcon/testing/client.py

@@ -35,7 +35,6 @@
 from typing import Mapping
 from typing import Optional
 from typing import overload
-from typing import Self
 from typing import Sequence
 from typing import TextIO
 from typing import Tuple
@@ -46,6 +45,8 @@
 import warnings
 import wsgiref.validate
 
+from typing_extensions import Self
+
 from falcon.asgi_spec import ScopeType
 from falcon.constants import COMBINED_METHODS
 from falcon.constants import MEDIA_JSON

setup.cfg

@@ -54,6 +54,7 @@ include_package_data = True
 packages = find:
 python_requires = >=3.7
 install_requires =
+    typing-extensions >= 4.2.0
 tests_require =
     testtools
     requests