Use Iterator foreach in Entity.Children

src/gaemstone/ECS/Entity.cs

@@ -24,8 +24,7 @@ public unsafe readonly struct Entity
 
 	public IEnumerable<Entity> Children { get {
 		var term = new ecs_term_t { id = Universe.EcsChildOf & this };
-		var iter = Iterator.FromTerm(Universe, term);
-		while (iter.Next())
+		foreach (var iter in Iterator.FromTerm(Universe, term))
 			for (var i = 0; i < iter.Count; i++)
 				yield return iter.Entity(i);
 	} }