Until yesterday, i had worked in this repo using feature branches like
WIP-foo. My practice would be too do work on crate "foo" on a branch
WIP-foo off of master, rebase it atop origin/master, and then run
./release.sh there to turn it into pending-foo branch, without having
merged the feature into master directly.
This change preserves the ability to use that workflow, while not
breaking the "do all your work but release on the master branch" for
those who prefer it.