Update to Minecraft 1.20

By: md_5 <git@md-5.net>

paper-server/nms-patches/net/minecraft/world/item/trading/MerchantRecipe.patch

@@ -32,15 +32,15 @@
  
      public MerchantRecipe(NBTTagCompound nbttagcompound) {
          this.rewardExp = true;
-@@ -78,6 +96,7 @@
+@@ -81,6 +99,7 @@
+             return ItemStack.EMPTY;
+         } else {
+             int i = this.baseCostA.getCount();
++            if (i <= 0) return ItemStack.EMPTY; // CraftBukkit - SPIGOT-5476
+             int j = Math.max(0, MathHelper.floor((float) (i * this.demand) * this.priceMultiplier));
  
-     public ItemStack getCostA() {
-         int i = this.baseCostA.getCount();
-+        if (i <= 0) return ItemStack.EMPTY; // CraftBukkit - SPIGOT-5476
-         ItemStack itemstack = this.baseCostA.copy();
-         int j = Math.max(0, MathHelper.floor((float) (i * this.demand) * this.priceMultiplier));
- 
-@@ -199,7 +218,11 @@
+             return this.baseCostA.copyWithCount(MathHelper.clamp(i + j + this.specialPriceDiff, 1, this.baseCostA.getItem().getMaxStackSize()));
+@@ -201,7 +220,11 @@
          if (!this.satisfiedBy(itemstack, itemstack1)) {
              return false;
          } else {