2022 week 01 software update

Update dependencies in PrivateStorageio as appropriate:

nixpkgs (https://whetstone.privatestorage.io/privatestorage/PrivateStorageio/-/merge_requests/231)
ZKAPAuthorizer (https://whetstone.privatestorage.io/privatestorage/PrivateStorageio/-/merge_requests/230)
~~PaymentServer~~

Edited Jan 05, 2022 by Jean-Paul Calderone