fix:修复BUG/升级1.1.6版本

vendor/laravel/serializable-closure/src/SerializableClosure.php

@@ -62,6 +62,17 @@ class SerializableClosure
         return $this->serializable->getClosure();
     }
 
+    /**
+     * Create a new unsigned serializable closure instance.
+     *
+     * @param  Closure  $closure
+     * @return \Laravel\SerializableClosure\UnsignedSerializableClosure
+     */
+    public static function unsigned(Closure $closure)
+    {
+        return new UnsignedSerializableClosure($closure);
+    }
+
     /**
      * Sets the serializable closure secret key.
      *