Add object_t
// Basic type (loose or packed) of any Git object. export type object_t = enum { OBJECT_ANY = -2, // Object can be any of the following OBJECT_INVALID = -1, // Object is invalid. OBJECT_COMMIT = 1, // A commit object. OBJECT_TREE = 2, // A tree (directory listing) object. OBJECT_BLOB = 3, // A file revision object. OBJECT_TAG = 4, // An annotated tag object. };