How to handle Dependencies that are not published on PyPi

I was adding adafruit_logging as a dependency to adafruit_azureiot and ran into this issue where Adafruit-CircuitPython-Logging isn't published on pypi, so the build failed.

I don't have any thoughts about that yet.. but I wanted to capture the issue for now.
@makermelissa you probably are thinking about this as well.

See Related:
https://github.com/adafruit/Adafruit_CircuitPython_AzureIoT/pull/29

Start with the dependency-handling behavior described in this issue and inspect the related Adafruit_CircuitPython_AzureIoT pull request. Determine how circup should handle dependencies that are not published on PyPI; done requires an agreed behavior and corresponding implementation scope.

Written by the indexing model from the issue text.