[MNT] extend CI to newer python versions, deprecate python versions 3.8, 3.9 after EOL, marking further failing tests as xfail
#1635
test.yml
on: pull_request
(windows-latest, Py, sk0.24.*, sk-only:false)
2s
(ubuntu-latest, Py3.8, sk0.23.1, sk-only:false)
3s
docker
3s
Matrix: test