LifterLMS REST API Version 1.0.0-beta.23

Updates and Enhancements

• Replaced call to deprecated LLMS_Section::get_parent_course() with LLMS_Section::get( 'parent_course' ).
• Replaced the calls to the deprecated LLMS_Lesson::get_parent_course() method with LLMS_Lesson::get( 'parent_course' ).
• Replaced deprecated llms_user_removed_from_membership_level action hook with llms_user_removed_from_membership.