fix on review comment: move constant DEFAULT_PRIORITY to the interface

Author: tashik

phalcon/Events/Manager.zep

@@ -21,8 +21,6 @@ use SplPriorityQueue;
  */
 class Manager implements ManagerInterface
 {
-    const DEFAULT_PRIORITY = 100;
-
     /**
      * @var bool
      */

phalcon/Events/ManagerInterface.zep

@@ -15,12 +15,13 @@ namespace Phalcon\Events;
  */
 interface ManagerInterface
 {
+    public const DEFAULT_PRIORITY = 100;
     /**
      * Attach a listener to the events manager
      *
      * @param object|callable handler
      */
-    public function attach(string! eventType, handler, int! priority = 100) -> void;
+    public function attach(string! eventType, handler, int! priority = self::DEFAULT_PRIORITY) -> void;
 
     /**
      * Detach the listener from the events manager