Migrate from master -> main

[stufield]

migrate over to the base branch being the main branch and away from master

[stufield]

Users/cloners will have to update their local repository to accommodate this change locally:

git branch -m master main
git fetch origin
git branch -u origin/main main
git remote set-head origin -a

Alternatively, nuke the local repository and re-clone the repository. Depending on the number of local branches/forks you have, this may be the simplest option.