fix possible errors when mending is unsafely enchanted on something it wasn't supposed to be enchanted on

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>me.youhavetrouble</groupId>
     <artifactId>MendingBeGone</artifactId>
-    <version>1.3.1</version>
+    <version>1.3.2</version>
     <packaging>jar</packaging>
 
     <name>MendingBeGone</name>

src/main/java/me/youhavetrouble/mendingbegone/MendingBeGone.java

@@ -75,7 +75,7 @@ public final class MendingBeGone extends JavaPlugin implements Listener {
             itemStack.removeEnchantment(Enchantment.MENDING);
             if (itemStack.containsEnchantment(Enchantment.DURABILITY))
                 itemStack.removeEnchantment(Enchantment.DURABILITY);
-            itemStack.addEnchantment(Enchantment.DURABILITY, 3);
+            itemStack.addUnsafeEnchantment(Enchantment.DURABILITY, 3);
         }
         if (!Material.ENCHANTED_BOOK.equals(itemStack.getType())) return;
         ItemMeta meta = itemStack.getItemMeta();