[WIP] Add publishing to test pypi

[charlesdrotar]

Description

Please include a summary of the change and which issue is fixed.
Please also include relevant motivation and context. List any dependencies
that are required for this change.

Fixes #(issue)

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes.
Provide instructions so we can reproduce. Please also list any relevant details
for your test configuration

• Testing as part of PR process to see that it publishes to test pypi
• Testing that I can install test pypi to new anaconda environment.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes