Add asyncio_mode setting for pytest

Author: Cito

setup.cfg

@@ -15,5 +15,9 @@ ignore =
 addopts = --benchmark-disable
 # Deactivate default name pattern for test classes (we use pytest_describe).
 python_classes = PyTest*
+# Handle all async fixtures and tests automatically by asyncio
+asyncio_mode = auto
 # Set a timeout in seconds for aborting tests that run too long.
 timeout = 100
+# Ignore config options not (yet) available in older Python versions.
+filterwarnings = ignore::pytest.PytestConfigWarning