⬆️ Update git2 requirement from ^0.19 to ^0.20

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.toml

@@ -20,7 +20,7 @@ exclude = [
 
 [dependencies]
 dirs = "^5.0"
-git2 = { version = "^0.19", default-features = false }
+git2 = { version = "^0.20", default-features = false }
 dialoguer = { version = "^0.11", optional = true }
 pest = "^2.3"
 pest_derive = "^2.3"
@@ -29,7 +29,7 @@ regex = "^1.6"
 [dev-dependencies]
 pretty_assertions = "1.3"
 tempfile = "3.3"
-git2 = { version = "^0.19" }
+git2 = { version = "^0.20" }
 
 [features]
 default = ["ui4dialoguer"]