Fix error when using worktrees or submodules

[abrenneke]

Pass parent .git directory to simple-git when the git directory is resolved to .git/worktrees/etc or .git/modules/etc.

Honestly since worktrees are local only things... I think a unit test would be difficult. It'd probably have to set up a worktree, put code into it, and test betterer there? I just made a test repo and verified the change works. If you have other ideas for tests, let me know.

Fixes #786

[phenomnomnominal]

I wonder if this should be fixed infindGitRoot. It claims to be solved here: banyudu/find-git-root#2

[abrenneke]

Yeah I saw that, looks like they added support in there for following the path that the .git file points to... but is that the "git root" or not? I guess not... This is currently blocking two people so getting this asap one way or another would be really helpful 🙏

[abrenneke]

Hold up, found problem

[abrenneke]

Okay current PR is confirmed to work now.

find-git-root just does it incorrectly, so I just rewrote their function and removed it as a dep. The correct way to handle worktrees and submodules is to basically just ignore it and assume a directory with a .git file or folder is the one you should be using.

And one less dep!

[phenomnomnominal]

Heck yeah, looks good to me!