You don’t have to wait anymore 
Beta version of UVPackmaster supporting Blender 2.8 is now available for all customers. If you want to check it out simply download an add-on zip file with ‘blend2.8-beta’ suffix in the name from gumroad.
Important note: we did a quick testing of the add-on with Blender 2.8 and it worked well and stable, despite that we consider this add-on version as beta simply because Blender 2.8 is currently in the beta version. Keep in mind that unexpected issues may always happen when using this configuration.