py-yubikey-manager,ykman: update to 5.4.0

* Version 5.4.0 (released)
* Support for YubiKey Bio Multi-protocol Edition.
* CLI: Improve error messages for several failures.
* Attempt to send SIGHUP to yubikey-agent if it is blocking the connection.
* Bugfix: Allow "fido config" to work when no PIN is set on the YubiKey.
* Bugfix: MacOS - Fix race condition resulting in unneeded delay in fido commands over
  USB.
* Bugfix: Linux - Fix error when listing OTP devices when no YubiKeys are attached.
* Bugfix: OpenPGP - Fix RSA key generation on YubiKey NEO.

(wiz)