add user biometrics to Pypi

Hi, I wasn't able to publish this package, because the user biometrics is not allowed. Neither am I. Could you please do it @pkorshunov?

check the log https://gitlab.idiap.ch/bob/bob.db.avspoof/builds/19152

Once done, just rerun the stage that failed here. https://gitlab.idiap.ch/bob/bob.db.avspoof/builds/19152

Thanks