This version bump looks like much but it just is there to qualify the move from legacy to 1.13 API. There has been a big change:

The updater works like in my other plugins now, you now have a config block like this:

update:
mode: both
type: beta

Mode case insensitively supports:

• off (fallback default)
• announce - announce updates to OP players when they join the server
  
• download - download updates automatically for the next reboot
  
• both - do both and simply inform players rather that the update will happen on reboot, rather than asking them to download

Type case insensitively supports:

• alpha - bleeding edge
  
• beta - fairly tested things
  
• release (fallback default)