Log Message:
stagit: Update to 1.2

Changes:
1.2
---
* Unset a newly introduced option in libgit2 that do not allow different users
  from reading the git repository. This is not a security issue for stagit.
  See also the related page:
  https://github.blog/2022-04-12-git-security-vulnerability-announced/
* Add a workaround comment in the Makefile for distros or packagers using an
  older libgit2 version (Void Linux, Debian, etc).