Adopted pyenv-asyncio for async unit tests

Author: miguelgrinberg

pyproject.toml

@@ -41,3 +41,7 @@ namespaces = false
 [build-system]
 requires = ["setuptools>=61.2"]
 build-backend = "setuptools.build_meta"
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+asyncio_default_fixture_loop_scope = "session"