Update to 22.1.0 and increase the memory constraint since it sometimes
results in an error such as:

[ 401s] ../tests/test_socket.py::TestSocket::test_large_send [ 374.574996] Out of memory: Killed process 3386 (pytest-3.6) total-vm:6451008kB, anon-rss:2193620kB, file-rss:0kB, shmem-rss:0kB, UID:399 pgtables:8652kB oom_score_adj:0

- Update to 22.1.0
* New features:
- asyncio: experimental support for Proactor eventloop if
tornado 6.1 is available by running a selector in a
background thread.
* Fixes:
- Windows: fix type of socket.FD option in win-amd64
- asyncio: Cancel timers when using HWM with async Sockets
* Other changes:
- Windows: update bundled libzmq dll URLs for Windows. Windows
wheels no longer include concrt140.dll.
- adopt pre-commit for formatting, linting

- Increase memory constraint from 8000M to 9000M since build
sometimes fails with "Out of memory" errors.