Update Bukkit for Minecraft 1.4(.2) changes.

By: Travis Watkins <amaranth@ubuntu.com>

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

@@ -127,6 +127,10 @@ public class CreatureSpawnEvent extends EntityEvent implements Cancellable {
          * When an iron golem is spawned by being built
          */
         BUILD_IRONGOLEM,
+        /**
+         * When a wither boss is spawned by being built
+         */
+        BUILD_WITHER,
         /**
          * When an iron golem is spawned to defend a village
          */

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

@@ -176,6 +176,10 @@ public class EntityDamageEvent extends EntityEvent implements Cancellable {
          * Damage: variable
          */
         MAGIC,
+        /**
+         *
+         */
+        WITHER,
         /**
          * Custom damage.
          * <p />

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

@@ -92,6 +92,14 @@ public class EntityRegainHealthEvent extends EntityEvent implements Cancellable
          * When a player is healed over time by a potion or spell
          */
         MAGIC_REGEN,
+        /**
+         * When a wither is filling its health during spawning
+         */
+        WITHER_SPAWN,
+        /**
+         * When an entity is damaged by the Wither potion effect
+         */
+        WITHER,
         /**
          * Any other reason not covered by the reasons above
          */