Adds missing tests for ItemHelper

src/main/java/net/knarcraft/blacksmith/util/ItemHelper.java

@@ -3,6 +3,7 @@ package net.knarcraft.blacksmith.util;
 import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.Damageable;
+import org.bukkit.inventory.meta.ItemMeta;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -67,6 +68,23 @@ public final class ItemHelper {
         }
     }
 
+    /**
+     * Updates the damage done to an item
+     *
+     * @param item      <p>The item to update damage for</p>
+     * @param newDamage <p>The new damage done</p>
+     * @return <p>True if the damage was updated. False if not damageable.</p>
+     */
+    public static boolean updateDamage(ItemStack item, int newDamage) {
+        ItemMeta meta = item.getItemMeta();
+        if (!(meta instanceof Damageable damageable)) {
+            return false;
+        }
+        damageable.setDamage(newDamage);
+        item.setItemMeta(meta);
+        return true;
+    }
+
     /**
      * Gets a complete list of all reforge-able materials
      *