Support ES-256 COSEAlgorithmIdentifier

[inbalzelinger]

Hey, we would appreciate if you will add ES-256 see https://webauthn.io/ advanced options,
New Yubikeys are require this Algorithm on registration. It then allows the user to register the Yubikey with a pin code.

once we don't have it on registration and the Yubikey isn't already registered in this browser with a pin code the registration will success but we wont be able to do authentication

[MasterKale]

Please report issues with https://webauthn.io at its repo here: https://github.com/duo-labs/webauthn.io

[MasterKale]

Just in case I misunderstood, this library already defines ES256 (-7) on COSEAlgorithmIdentifier as its full name, ECDSA_SHA_256:

https://github.com/duo-labs/py_webauthn/blob/master/webauthn/helpers/cose.py#L23