/usr/lib/x86_64-linux-gnu/libicuio.so is in libicu-dev 60.2-3ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libicuio.so.60.2
/usr/lib/x86_64-linux-gnu/libicuio.so.60.2