Pin pytest-asyncio to <=0.21

[sentrivana]

Seems like the recent release of pytest-asyncio 0.23 might have broken some of our tests -- validating that assumption.

[antonpirker]

I think it is not pytest-asyncio (those are the changes for latest release: https://github.com/pytest-dev/pytest-asyncio/pull/704/files) but some sub-dependency

[sentrivana]

I think it is not pytest-asyncio (those are the changes for latest release: https://github.com/pytest-dev/pytest-asyncio/pull/704/files) but some sub-dependency

It still could be, I think we were going from 0.21.1 to 0.23.* and there was a lot happening between 0.21 and 0.23: pytest-dev/pytest-asyncio@v0.21.1...v0.23.0

[sentrivana]

Looks like adding an upper bound to pytest-asyncio fixes it -- I'd merge this for now to unblock other PRs and then investigate further if it can be narrowed down to a dependency of pytest-asyncio.