Merge pull request #61 from Warlock-9000/patch-1

Update FileStorage.php

Author: bilovol

src/Storage/FileStorage.php

@@ -56,7 +56,7 @@ public function get($key)
     /**
      * @param  $key string
      * 
-     * @return void
+     * @return bool
      */
     public function delete($key) 
     {