Hello,
error: Package requirements (libosmocore >= 1.3.0) were not met: libosmocore has already been the newest version (0.9.0-7)
it's obvious that your libosmocore is too old. I guess you're using a non-official package repository with ancient unmaintained packages. Osmocom provides up to date nightly [1] and latest release [2] binary packages for Debian-based distributions. You should remove your old package and use the one from Osmocom's repository. Or simply build the recent libosmocore yourself.
[1] https://osmocom.org/projects/cellular-infrastructure/wiki/Nightly_Builds [2] https://osmocom.org/projects/cellular-infrastructure/wiki/Latest_Builds
With best regards, Vadim Yanitskiy.