[webauthn] Pull Request: Update CTAP reference.

agl has just submitted a new pull request for https://github.com/w3c/webauthn:

== Update CTAP reference. ==
We probably want to do this again once 2.1 is final but, for now, this
brings in three years of changes.

See https://github.com/w3c/webauthn/pull/1585


-- 
Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config