deprecated code (3.10 blocker?) in requests

[jacalata]

Describe the bug
test_revoke_all_server_admin_tokens (test.test_auth.AuthTests) ... C:\data\Programs\Python\Python39\lib\site-packages\requests\models.py:177: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.10 it will stop working
if isinstance(hook, collections.Callable):

Fix is in requests since 2018, in version 2.20.2: psf/requests#4494