chore(deps): update git2 to use libgit2 1.9 (#78)

Signed-off-by: Rui Chen <[email protected]>

Author: chenrui333

Cargo.toml

@@ -14,7 +14,7 @@ edition = "2021"
 cargo-lock = { version = "10.0", optional = true, default-features = false }
 semver = { version = "1.0", optional = true }
 chrono = { version = "0.4", optional = true, default-features = false, features = ["clock"] }
-git2 = { version = "0.19", optional = true, default-features = false, features = [] }
+git2 = { version = "0.20", optional = true, default-features = false, features = [] }
 
 [dev-dependencies]
 tempfile = "3"