/usr/lib/x86_64-linux-gnu/libyubikey.so is in libyubikey-dev 1.10-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libyubikey.so.0.1.4
/usr/lib/x86_64-linux-gnu/libyubikey.so.0.1.4