I have published a new snaphot for 1.13 that will be available on jenkins
A couple of points -
* existing backups of games that included rollback data may need to be re backed up to use the new
rollback generator. This needs testing
* Configs will no longer accept magic numbers or material data. Most will serealize items and blockdata.
* Old configs that contained this sort of data may need manual editing
Please post feedback...on spigot discussion thread for now.