Added DamageCause.STARVATION.

By: EvilSeph <evilseph@gmail.com>

paper-api/src/main/java/org/bukkit/event/entity/EntityDamageEvent.java

@@ -149,6 +149,12 @@ public class EntityDamageEvent extends EntityEvent implements Cancellable {
          * Damage: 1000
          */
         SUICIDE,
+        /**
+         * Damage caused by starving due to having an empty hunger bar
+         *
+         * Damage: 1
+         */
+        STARVATION,
         /**
          * Custom damage.
          *