Fix mypy tests on 3.10

Looks like this was a bug fixed upstream

Author: euresti

conftest.py

@@ -27,9 +27,3 @@ def pytest_configure(config):
     )
 if not PY310:
     collect_ignore.extend(["tests/test_pattern_matching.py"])
-if PY310:
-    collect_ignore.extend(
-        [
-            "tests/test_mypy.yml",
-        ]
-    )

tox.ini

@@ -128,7 +128,7 @@ commands = towncrier --draft
 
 [testenv:typing]
 basepython = python3.8
-deps = mypy>=0.800
+deps = mypy>=0.902
 commands =
     mypy src/attr/__init__.pyi src/attr/_version_info.pyi src/attr/converters.pyi src/attr/exceptions.pyi src/attr/filters.pyi src/attr/setters.pyi src/attr/validators.pyi
     mypy tests/typing_example.py