Git-machete

- added: GitLab support via `git machete gitlab` (first suggested by mikeynap, partly contributed by max-nicholson)
- added: `git machete anno -L`/`--sync-gitlab-mrs` flag
- fixed: checking out GitHub PRs where head branch comes from an already deleted fork
- added: qualifier `update=merge` allows selecting merge strategy per branch (contributed by gjulianm)
- added: Scoop package for Windows (suggested by ppasieka)

- fixed: automatic updates of Homebrew formula

- fixed: deployment issues

- added: `-f`/`--as-first-child` flag to `git machete add` (contributed by matthalp)
- fixed: `git machete github retarget-pr` not updating description of PR due to stray `\r` characters

- fixed: make fork-point also take into account common ancestors (and not only reflogs) in more cases

- fixed: if a PR has a pre-v3.23.0 `Based on PR ...` header, then it's removed by `git machete github retarget-pr` in favor of the new extended PR chain