Some breakages occurred as paperspigot was updated, as well as some forks ended up breaking compatibility. This has been resolved.

An important fix: fixes custom entities (Traincarts trains) disappearing when they are unloaded and reloaded, especially during server restart. This was especially a problem on Paperspigot.

Changes

• Added support for Purpur server fork
• Added support for Tuinity server fork
• Added support for recent changes in Paperspigot (getVisibleChunk)
  
• Fix custom entities despawning after chunk unload or server restart
• Fix NPE when hasDisplayName input item is null
• Fixed water renderer showing warning on 1.8.8 and earlier
• Added map display block and item rendering for skulls, barrier blocks, signs, clock item and compass item, fixing glitches on older versions of Minecraft
• Fixed concurrent modification error server crash on paperspigot 1.13
• Fixed oak and stone button not producing correct metadata for up and down facing (didn't trigger signs in Traincarts)
• Fixed rare server freeze due to VehicleMountHandler queue packet deadlock
• Fixed error when vehicle mount handler is used with temporary players (protocollib)
• Fix entity remove queue not working on paperspigot, causing glitches when spawning custom entities with custom network spawn packets
• Have ExtendedEntity getChunk() api make use of special feature in Paperspigot
  
• Added option to config.yml to entirely disable the map displays API to improve performance when map displays aren't used
  
• Added ForcedChunk clone() method
  
• Added onItemDrop callback to MapDisplay and MapWidget
• New optimizations in Matrix4x4 vector math