Log Message:
py-test-asyncio: updated to 0.15.1

0.15.1 (2021-04-22)

Hotfix for errors while closing event loops while replacing them.

0.15.0 (2021-04-19)

Add support for Python 3.9
Abandon support for Python 3.5. If you still require support for Python 3.5, \ 
please use pytest-asyncio v0.14 or earlier.
Set unused_tcp_port_factory fixture scope to 'session'.
Properly close event loops when replacing them.