Bump dep on libgit2-sys

Author: alexcrichton

Cargo.toml

@@ -19,7 +19,7 @@ repositories.
 url = "1.0"
 bitflags = "0.7"
 libc = "0.2"
-libgit2-sys = { path = "libgit2-sys", version = "0.6.0" }
+libgit2-sys = { path = "libgit2-sys", version = "0.6.3" }
 
 [target."cfg(all(unix, not(target_os = \"macos\")))".dependencies]
 openssl-sys = { version = "0.9.0", optional = true }