fix: multiple oh-my-zsh plugins behavior

[caarlos0]

closes #238

still checking the performance of that.

[caarlos0]

maybe a better approach would be to allow multiple folder declarations... and it won't require this additional lock...

[Dessix]

That sounds more straight-forward.

[codecov-io]

Codecov Report

Merging #244 into master will increase coverage by 0.33%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #244      +/-   ##
==========================================
+ Coverage   79.11%   79.44%   +0.33%     
==========================================
  Files          11       11              
  Lines         249      253       +4     
==========================================
+ Hits          197      201       +4     
  Misses         49       49              
  Partials        3        3

Impacted Files	Coverage Δ
project/git.go	100% <100%> (ø)	⬆️

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[caarlos0]

the code end up being messier and performance worse.

other downside is that you can't have custom kind for each plugin (i.e. want one folder to be path and the other zsh).

will roll back to the locking version.

[Dessix]

The fix works great, thanks 👍