Use machine output for listing partially staged files

[johnnywalker]

When a partially staged file name contains one or more spaces or special characters, git status --porcelain escapes and quotes the file name (see https://github.com/okonet/lint-staged/blob/master/lib/gitWorkflow.js#L161). Consequently, gitWorkflow.hideUnstagedChanges() fails with a pathspec error since execa expects arguments to not be escaped or quoted:

[SUCCESS] Preparing...
[STARTED] Hiding unstaged changes to partially staged files...
[FAILED] error: pathspec '"src/file with spaces.ts"' did not match any file(s) known to git

  ✖ lint-staged failed due to a git error.
  Any lost modifications can be restored from a git stash:

    > git stash list
    stash@{0}: automatic lint-staged backup
    > git stash apply --index stash@{0}

This PR resolves the problem by using the machine output from git-status instead. Note: the order of renamed files in the status output is reversed and separated by a NUL character (instead of ->) when machine output (-z option) is specified.

[codecov]

Codecov Report

Merging #876 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #876   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           17        17           
  Lines          597       597           
  Branches       142       142           
=========================================
  Hits           597       597           

Impacted Files	Coverage Δ
lib/gitWorkflow.js	100.00% <100.00%> (ø)

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[iiroj]

Can't say anything else other than great work, and thanks for the PR!

[github-actions]

🎉 This PR is included in version 10.2.7 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[johnnywalker]

@iiroj Appreciate the note and thanks for merging!