Bump nodegit from 0.28.0-alpha.21 to 0.28.0-alpha.24

Bumps [nodegit](https://github.com/nodegit/nodegit) from 0.28.0-alpha.21 to 0.28.0-alpha.24.
- [Release notes](https://github.com/nodegit/nodegit/releases)
- [Changelog](https://github.com/nodegit/nodegit/blob/master/CHANGELOG.md)
- [Commits](nodegit/nodegit@v0.28.0-alpha.21...v0.28.0-alpha.24)

---
updated-dependencies:
- dependency-name: nodegit
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>