Update some dependencies (#452)

Author: bitshifter

Cargo.toml

@@ -8,7 +8,7 @@ edition = "2021"
 [dependencies]
 anyhow = { version = "1" }
 clap = { version = "3", default-features = false, features = ["cargo", "std"] }
-git2 = { version = "0.16", default-features = false }
+git2 = { version = "0.18", default-features = false }
 globset = { version = "0.4", default-features = false }
 rustfmt-wrapper = { version = "0.2" }
 serde = { version = "1.0", default-features = false, features = ["std"] }