Bump git2 from 0.18.3 to 0.19.0 (#3092)

Bumps [git2](https://github.com/rust-lang/git2-rs) from 0.18.3 to 0.19.0.
- [Changelog](https://github.com/rust-lang/git2-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/git2-rs/compare/git2-0.18.3...git2-0.19.0)

---
updated-dependencies:
- dependency-name: git2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -70,7 +70,7 @@ os_str_bytes = { version = "~7.0", optional = true }
 run_script = { version = "^0.10.1", optional = true}
 
 [dependencies.git2]
-version = "0.18"
+version = "0.19"
 optional = true
 default-features = false