yhp-keygen fails with error message "Invalid argument 4: tmp.logsrv.pem (t:key_type=asymmetric-key)"

Getting this kind of error messages from yhp-keygen:

Invalid argument 4: tmp.logsrv.pem (t:key_type=asymmetric-key)

It's the "get pubkey" command that fails, apparently because the behavior of that command changed in yubihsm-shell version 2.6.0.

See changes related to yh_com_get_pubkey in src/main.c in the yubihsm-shell git repo, looks like a "key_type" argument is now required: https://github.com/Yubico/yubihsm-shell/commit/080e32d73617ff70b0021a87e8330eac16c0581f