make mypy as strict as possible

pyproject.toml

@@ -123,3 +123,11 @@ target-version = ['py38']
 [tool.check-wheel-contents]
 # W009: Wheel contains multiple toplevel library entries
 ignore = "W009"
+
+[tool.mypy]
+strict = true
+disallow_untyped_defs = false
+disallow_incomplete_defs = false
+disallow_untyped_calls = false
+warn_unused_ignores = false
+ignore_missing_imports = true

testing/example_scripts/unittest/test_unittest_asynctest.py

@@ -8,7 +8,7 @@ import asynctest
 teardowns: List[None] = []
 
 
-class Test(asynctest.TestCase):
+class Test(asynctest.TestCase):  # type: ignore[misc]
     async def tearDown(self):
         teardowns.append(None)