As of yesterday, snapd 2.36.3 is available through Fedora EPEL for Red Hat Enterprise Linux 7.6 and derivatives (including derivatives of CentOS 7.6).
The installation process is simple:
$ sudo yum install epel-release
$ sudo yum install snapd
$ sudo systemctl enable --now snapd.socket snapd.refresh.timer
After that, you can use snaps by using the snap(8) command.