I did a fresh install of Ubuntu Server 18.04. It came preinstalled with LXC/LXD version 3.0.3. Using apt update / apt upgrade did not make this any newer.
I then installed followed the instructions here and installed the snap version. This is 4.0.0. I then did lxd.migrate and everything works perfectly all the containers are running nicely.
However, I understand that the latest version is 4.0.3. Using apt update / apt upgrade makes no difference. I assume this is because it is a snap package. So I tried snap refresh. This also does not update LXC/LXD.
Is snap refresh the way to update snap packages? What am I doing wrong?