fix: use git apply not system apply

[codebytere]

Closes #421.

Switches to git apply vs system apply, since the available options for system apply differ between systems.

cc @targos

[codecov]

Codecov Report

Merging #432 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #432   +/-   ##
=======================================
  Coverage   77.13%   77.13%           
=======================================
  Files          21       21           
  Lines        1496     1496           
=======================================
  Hits         1154     1154           
  Misses        342      342           

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[targos]

There is some regression. For example with this commit: v8/v8@50af617

git node v8 backport 50af61718d49c4f04d0839476c78e3b305d03de4 succeeds with the current implementation and doesn't work with this PR (it asks to resolve merge conflicts but there are no changed files).

[codebytere]

@targos should be fixed up now - working with the supplied commit.

[targos]

LGTM. Thanks!

[targos]

It broke one of the V8 commands:

https://ci.nodejs.org/job/node-update-v8-canary/1366/display/redirect

05:56:25] Commit V8 update [started]
[05:56:25] Commit V8 update [failed]
[05:56:25] → args.unshift is not a function
✖ args.unshift is not a function

I'll have a look later if I have time.

[codebytere]

@targos ah dang i know what it is - i missed two files when i was grepping. Fix up in a bit.