Python 3.9 support

[armujahid]

Currently Shrimpy doesn't support Python 3.9. I am running v3.9.6 and I am getting this error AttributeError: type object '_asyncio.Task' has no attribute 'all_tasks' That's because asyncio.Task.all_tasks() is fully moved to asyncio.all_tasks() starting with 3.9 This has already reported at https://github.com/shrimpy-dev/shrimpy-python/issues/16 , https://github.com/shrimpy-dev/shrimpy-python/issues/10 and https://github.com/shrimpy-dev/shrimpy-python/issues/4

Even after changing asyncio.Task.all_tasks(): to asyncio.all_tasks(): in line 92 in "shrimpy_ws_client.py" I am getting this error RuntimeError: no running event loop

I will debug and will hopefully raise a backward compatible PR like https://github.com/jupyterhub/jupyterhub/pull/3298

[gorkem2020]

hello,

I had the same issue and fixed it. check the pull requests