Git-machete

- fixed: package version retrieval outside of git repository
- fixed: checking whether a branch is merged to parent works for branches that have no common commit
- added: CI/CD check ensuring that RELEASE_NOTES are up to date
- fixed: `github create-pr` takes the PR title from the first unique commit

- added: extra options can be passed to the underlying `git rebase` via `GIT_MACHETE_REBASE_OPTS` env var (suggested by kgadek)
- fixed: build process of Docker images

- Added: an option to the branch rename dialog allowing to keep or discard the remote tracking branch info.
- Added: extra backup keyboard shortcut (`Ctrl + Option + Shift + M`) for opening Git Machete tab on macOS,
in case `Command + Option + Shift + M` is already taken by Kotlin plugin.
- Added: `Yes + Quit` button in Traverse dialogs.
- Improved: push action is no longer blocked by the other machete actions; it can be run in parallel.

- added: `gitmachete/git-machete` Docker image (contributed by mohitsaxenaknoldus)
- fixed: build process stability

- fixed: support for worktrees (reported by kgadek)

- added: `t` alias for `traverse` command
- fixed: remove underscore from `--start-from` flag for `traverse` subcommand