fix exports to allow error type to be visible publicly (#450)

Author: Byron

git-repository/src/config/mod.rs

@@ -5,7 +5,7 @@ use crate::{bstr::BString, permission, remote, repository::identity, revision::s
 
 pub(crate) mod cache;
 mod snapshot;
-pub use snapshot::apply_cli_overrides;
+pub use snapshot::{apply_cli_overrides, credential_helpers};
 
 /// A platform to access configuration values as read from disk.
 ///