Doesn't work with new webauthn

Hello,

Some time ago, a new version of webauthn. Since django-webauthin doesn't pin the version in https://gitlab.com/stavros/django-webauthin/-/blob/master/setup.py#L22, when installing django-webauthin the latest version of webauthn is pulled as a dependency. There were some mayor changes in webauthn and now, when attempting to use the module, an error is thrown:

AttributeError: module 'webauthn' has no attribute 'WebAuthnUser'