bump git2-rs

Author: extrawurst

Cargo.lock

@@ -14,7 +14,7 @@ keywords = ["git"]
 [dependencies]
 crossbeam-channel = "0.5"
 easy-cast = "0.5"
-git2 = "0.16"
+git2 = "0.17"
 log = "0.4"
 # git2 = { path = "../../extern/git2-rs", features = ["vendored-openssl"]}
 # git2 = { git="https://github.com/extrawurst/git2-rs.git", rev="fc13dcc", features = ["vendored-openssl"]}