WooCommerce Recommendation Engine 3.4.2

* Update: WC and WP Updates.
* Update: Remove hidden and products which are not available to the current user.
* Update: Remove legacy code, which was used to support older versions of WC.
* Update: Remove legacy async rebuild script.

* Fix: Fix view template for the shortcode, woocommerce_related_products_by_status when using the completed status.
* Update: Include new filters when rebuilding items directly from the admin dashboard.
* Update: WC and WP Updates.

* New: New filter, woocommerce_recommender_purchased_together_status, which will allow you to change the status that purchased together is built from.
add_filter('woocommerce_recommender_purchased_together_status', function($status) { return 'processing'; });

* New: New filter, woocommerce_recommender_also_purchased_status, which allows you to change the status the Also Purchased is rebuild from.
add_filter('woocommerce_recommender_also_purchased_status', function($status) { return 'processing'; });
* Update: WC and WP Updates.