feat: export git-tempfile in the root (#384)

This allows access to signal handler setup for example, which can be
useful in some situations.

Author: Byron

git-lock/src/lib.rs

@@ -19,6 +19,8 @@ use std::path::PathBuf;
 
 use git_tempfile::handle::{Closed, Writable};
 
+pub use git_tempfile as tempfile;
+
 const DOT_LOCK_SUFFIX: &str = ".lock";
 
 ///