Feature default branch and publish

[RobertReaves]

Short description of the work completed

Use default branch from repo and now prompt when package is attempting to publish on a package that has never been published before

Steps to test (if not obvious)

1. run lots of things. :)

For Reviewer Use Only

• Code Reviewed
• Tests Passed
• Coverage Reviewed
• Feature worked as expected
• Updated src/help.js and README.md
• Is the version upgrade path clear for this change? (breaking vs minor vs
  patch)
• Follow up work tracked in a card if needed