Make the daily test not fail tonight on Python 3.13 (#367)

it's about to fail because of python/cpython#115913

Author: AlexWaygood

CHANGELOG.md

@@ -1,3 +1,10 @@
+# Unreleased
+
+- Fix tests on Python 3.13.0a6. 3.13.0a6 adds a new
+  `__static_attributes__` attribute to all classes in Python,
+  which broke some assumptions made by the implementation of
+  `typing_extenions.Protocol`.
+
 # Release 4.11.0 (April 5, 2024)
 
 This feature release provides improvements to various recently

src/typing_extensions.py

@@ -442,6 +442,9 @@ def clear_overloads():
 if sys.version_info >= (3, 12):
     _EXCLUDED_ATTRS.add("__type_params__")
 
+if sys.version_info >= (3, 13):
+    _EXCLUDED_ATTRS.add("__static_attributes__")
+
 _EXCLUDED_ATTRS = frozenset(_EXCLUDED_ATTRS)