upgrade git2-rs

Author: Stephan Dilly

Cargo.lock

@@ -10,8 +10,7 @@ license = "MIT"
 categories = ["concurrency","asynchronous"]
 
 [dependencies]
-# git2 = "0.13"
-git2 = { git = "https://github.com/rust-lang/git2-rs.git", rev = "617499d7fcf315cf92faa1ffde425666d3edd500" }
+git2 = "0.13.2"
 rayon-core = "1.7"
 crossbeam-channel = "0.4"
 log = "0.4"