* WordPress 5.2 compatibility.
* Updated term order handling for product attributes as WC 3.6.x replaces termmeta order_pa_{$taxonomy} with order.
* Added support for sorting product attributes numerically, i.e. based on name_num "Name (numeric)".
* Improved front and back end resource dependency resilience (more robust checks for jQuery presence independent of load order).
* Updated the Spanish translation.
* Added the Indonesian translation.