Update git2 requirement from 0.18.0 to 0.19.0 (#27)

---
updated-dependencies:
- dependency-name: git2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -22,7 +22,7 @@ serde_json = "1.0"
 chrono = "0.4"
 assert_cmd = "2.0.10"
 tempfile = "3.2.0"
-git2 = "0.18.0"
+git2 = "0.19.0"
 mockito = "1.0.2"
 csv = "1.1"
 log = "0.4"