You can try install 5.2.1 version after hour. If all ok then i will commit into master and 5.2 branch. libphonenumber is packaged for [CentOS7 and Fedora 28 and 29](https://build.opensuse.org/package/show/home:kamailio:v5.2.x-rpms/libphonenu...) dists. If you want same on OpenSUSE, then need suggestion how to package libphonemuber on this dist.
On RHEL we cannot build, because required libs is not available on OBS servers.