** Improved extension handling:
Several new extensions are now supported, both for Fido2Client and WindowsClient.
Extension APIs have been redesigned, and old APIs have been deprecated, slated for
removal in version 2.0.
*** Disable hmac-secret extension by default, preferring prf.
** Improved (de-)serialization of dataclasses to/from JSON-friendly dicts.
** Fido2Client:
*** Support allowCredentials/excludeCredentials of arbitrary length.
*** Handle PUAT_REQUIRED by re-attempting with PIN/UV.
** Allow localhost (and subdomains) to use http:// in RP ID verification by default.
** NFC: Support for Authenticators that return SW=61XX on SELECT.
** USB: Improve connection recovery and use more specific exceptions for errors.
** Fix: Handle residentKey=preferred properly.
** Fix: Handle Authentictors that do not pass extensions in GetInfo.