Fix bundle submodules not updating

[devnoname120]

Overview

Antidote doesn't update or clone the new submodules when running antidote update. It only does when calling the first antidote install.

How to reproduce

antidote install -b v5.8.3 olets/zsh-abbr

pushd "$(antidote path olets/zsh-abbr)"
git config remote.origin.fetch "+refs/heads/*:refs/remotes/origin/*"
git fetch origin main
git checkout -b main 
git branch --set-upstream-to=origin/main
popd

echo "olets/zsh-abbr branch:v6.0.0" > ~/.zsh_plugins.txt
antidote update

Then:

❯ antidote load ~/.zsh_plugins.txt
abbr: Finishing installing dependencies
abbr: There was a problem finishing installing dependencies

Same reproduction instructions as above but this time with my fix and now the output looks good:

❯ antidote load ~/.zsh_plugins.txt

[mattmc3]

Thank you for this. I'll try to look more closely later this week and see if there's some more meaningful tests that need added to put this feature through it's paces. I suspect the only change I'd ask for is the addition of the --quiet flag, but I want to try some edge cases first.