SPIGOT-1468: ENDER_PEARL SpawnReason

src/main/java/org/bukkit/event/entity/CreatureSpawnEvent.java

@@ -168,6 +168,10 @@ public class CreatureSpawnEvent extends EntityEvent implements Cancellable {
          * When an entity spawns as a trap for players approaching
          */
         TRAP,
+        /**
+         * When an entity is spawned as a result of ender pearl usage
+         */
+        ENDER_PEARL,
         /**
          * When a creature is spawned by plugins
          */