Fix Nukkit related compilation issue

Author: AuroraLS3

Plan/nukkit/src/main/java/com/djrapitops/plan/gathering/listeners/nukkit/DeathEventListener.java

@@ -18,8 +18,8 @@
 
 import cn.nukkit.Player;
 import cn.nukkit.entity.Entity;
+import cn.nukkit.entity.EntityTameable;
 import cn.nukkit.entity.item.EntityEndCrystal;
-import cn.nukkit.entity.passive.EntityTameable;
 import cn.nukkit.entity.projectile.EntityProjectile;
 import cn.nukkit.event.EventHandler;
 import cn.nukkit.event.EventPriority;
@@ -131,13 +131,13 @@ public String findWeapon(Entity dead) {
         EntityDamageEvent entityDamageEvent = dead.getLastDamageCause();
         Entity killer = ((EntityDamageByEntityEvent) entityDamageEvent).getDamager();
         if (killer instanceof Player) return getItemInHand((Player) killer);
-        if (killer instanceof EntityTameable) return getPetType((EntityTameable) killer);
+        if (killer instanceof EntityTameable) return getPetType(killer);
 
         // EntityProjectile, EntityEndCrystal and all other causes that are not known yet
         return new EntityNameFormatter().apply(killer.getName());
     }
 
-    private String getPetType(EntityTameable tameable) {
+    private String getPetType(Entity tameable) {
         return tameable.getName();
     }
 
@@ -156,7 +156,7 @@ private Optional<Player> getShooter(EntityProjectile projectile) {
     }
 
     private Optional<Player> getOwner(EntityTameable tameable) {
-        if (!tameable.isTamed()) {
+        if (!tameable.hasOwner()) {
             return Optional.empty();
         }