export authenticate from lib.
export authenticate from lib.

PR: #21
PR-URL: https://github.com/joyent/git-apply-pr/pull/21
Reviewed-By: Robert Kowalski <91d1dd8615d34a96099572be3f37ee9127974eeb@kowalski.gd>

robertkowalski/git-apply-pr,joyent/git-apply-pr