SPIGOT-1871: Fix wrong argument order in CraftMerchantRecipe

src/main/java/org/bukkit/craftbukkit/inventory/CraftMerchantRecipe.java

@@ -19,9 +19,9 @@ public class CraftMerchantRecipe extends MerchantRecipe {
     public CraftMerchantRecipe(ItemStack result, int uses, int maxUses, boolean experienceReward) {
         super(result, uses, maxUses, experienceReward);
         this.handle = new net.minecraft.server.MerchantRecipe(
+                null,
+                null,
                 CraftItemStack.asNMSCopy(result),
-                null,
-                null,
                 uses,
                 maxUses,
                 this