fix: add parent property to avoid dynamic property (#109)

* fix: add parent property to avoid dynamic property

* docs: update the tested up to version

Author: MaferMazu

README.txt

@@ -2,7 +2,7 @@
 Contributors: felipemontoya, julianrg2, mafermazu
 Tags: openedx, open edx, ecommerce, lms, courses
 Requires at least: 6.3
-Tested up to: 6.7
+Tested up to: 6.8
 Requires PHP: 8.0
 Stable tag: 2.0.7
 License: GPLv2 or later

includes/model/class-openedx-commerce-enrollment.php

@@ -46,6 +46,14 @@ class Openedx_Commerce_Enrollment {
 
 	private $log_manager;
 
+	/**
+	 * The parent class object.
+	 *
+	 * @var     object
+	 * @access  private
+	 */
+	private $parent;
+
 	/**
 	 * Constructor function.
 	 *