GitLab

* Add branch protection option to block merge on requested changes.

* Add migration step

* Fix check to correct negation

* Apply suggestions from code review

Language improvement.
Co-Authored-By: John Olheiser <42128690+jolheiser@users.noreply.github.com>

* Copyright year.
Co-authored-by: John Olheiser <42128690+jolheiser@users.noreply.github.com>
Co-authored-by: Lauris BH <lauris@nix.lv>