Implemented JsonSerializable interface to ExtendedCacheItemInterface

Author: Geolim4

src/phpFastCache/Cache/ExtendedCacheItemInterface.php

@@ -20,7 +20,7 @@
  * Interface ExtendedCacheItemInterface
  * @package phpFastCache\Cache
  */
-interface ExtendedCacheItemInterface extends CacheItemInterface
+interface ExtendedCacheItemInterface extends CacheItemInterface, \JsonSerializable
 {
     /**
      * @return mixed

src/phpFastCache/Cache/ItemBaseTrait.php

@@ -418,15 +418,13 @@ public function getDataAsJsonString($option = 0, $depth = 512)
     }
 
     /**
-     * @throws \RuntimeException
-     */
-    /*    final public function __sleep()
-        {
-            $info = get_object_vars($this);
-            $info[ 'driver' ] = 'object(' . get_class($info[ 'driver' ]) . ')';
-    
-            return (array) $info;
-        }*/
+     * Implements \JsonSerializable interface
+     * @return mixed
+     */
+    public function jsonSerialize()
+    {
+        return $this->get();
+    }
 
     /**
      * Prevent recursions for Debug (php 5.6+)