Updated config for pytest-asyncio 0.19 (#1879)
Updated config for pytest-asyncio 0.19 (#1879)

Set `asyncio_mode = auto`, which is recommended for projects, like
Channels, that do not need to support multiple frameworks, such as
asyncio and trio.

pytest-asyncio 0.19 sets `asyncio_mode = strict` by default, which
would require explicitly marking tests and fixtures to be run with
asyncio.

See https://github.com/pytest-dev/pytest-asyncio/releases/tag/v0.19.0
for details.
django/channels