@arochester, no, on closer look, it doesn't seem so. Ubuntu's version scheme is odd... but the current Wine 3.0.1 is not what you get if you install 3.0-1ubuntu1 from the current Bionic Beaver repository... you get 3.0. I have no idea what "1ubuntu1" means! I just confirmed 3.0 by installing it with a Live 18.04 DVD and Synaptic. Wikipedia says that 3.0.1 was only just released in May (after Bionic was released)... so it is very current, and most repositories are not usually that quick to get new versions. However, I cannot find any info on when the Ubuntu team will incorporate 3.0.1 either. Sooner or later!
It is a Debian-based numbering system for package management recognition, which Ubuntu in particular seems to enjoy using, and have been using since before I started Linux around 2012.I have no idea what "1ubuntu1" means!