Work around Python 3.10 exception swallowing

Exceptions raised in __set_name__ are wrapped in a RuntimeError on Python 3.10. The test now
allows this if Python < 3.11.

Author: rwb27

tests/test_properties.py

@@ -1,3 +1,4 @@
+import sys
 from threading import Thread
 
 from pytest import raises
@@ -73,16 +74,17 @@ class BasicThing(Thing):
 
 def test_instantiation_with_type_and_model():
     """If a model is specified, we check it matches the inferred type."""
+    old_python = sys.version_info < (3, 11)
 
     class BasicThing(Thing):
         prop = ThingProperty[bool](model=bool, initial_value=False)
 
-    with pytest.raises(MismatchedTypeError):
+    with pytest.raises(RuntimeError if old_python else MismatchedTypeError):
 
         class InvalidThing(Thing):
             prop = ThingProperty[bool](model=int, initial_value=False)
 
-    with pytest.raises(MissingTypeError):
+    with pytest.raises(RuntimeError if old_python else MissingTypeError):
 
         class InvalidThing(Thing):
             prop = ThingProperty(model=bool, initial_value=False)