Prevent a warning in PHP 8.2 (#370)

* Prevent a warning in PHP 8.2

* Made a variable public to allow access in tests

Author: mmcev106

src/PHPSQLParser/PHPSQLCreator.php

@@ -65,6 +65,8 @@
  */
 class PHPSQLCreator {
 
+    public $created;
+
     public function __construct($parsed = false) {
         if ($parsed) {
             $this->create($parsed);