Update webauthn dependency

The webauthn dependency installed is 0.4.7, current webauthn 2.6.0 which supports android attestation formats (android-key and andrioid-safetynet). Version 0.4.7 webauthn doesn't work mobile devices because the version doesn't support android attestation format. Also I would love it if you could make it optional to return a Auth token or JWT token when a user logs in