WooCommerce API Manager 3.3.0

* Enhancement: Added action hooks to API update() method:
- wc_api_manager_update_success
* Tweak: Delete all activations when the customer's Master API Key is changed. This includes activations created by Product Order API Key and Associated API Key, since both are granted limited privileges by the Master API Key.
* Fix: WooCommerce Orders admin screen contains an API Product column alignment.
* Fix: Fatal error when status.php rendered without WooCommerce Subscriptions active.
* Fix: Calling get_all_order_ids() for each Product ID in data update caused memory exhaustion that was not logged or displayed, but presented as a failure to complete, although it had been completed.
* Fix: PHP Warning: trim() expects parameter 1 to be string, array given in /var/www/html/wp-content/plugins/woocommerce-api-manager/includes/wc-am-product-admin.php on line 1203.

* New: Create, and allow access to, API Resources for Order status "processing" if WooCommerce > Settings > Products > Access Restriction > Grant access to downloadable products after payment is selected.
* New: Added method has_status_processing().
* Fix: Check if order object exists before proceeding in several methods to avoid errors when order does not exist.
* Fix: Clear data cache before deleting/removing order

* Fix: Check if return value of $order->get_date_created() is null before calling $order->get_date_created()->date() to avoid fatal error in some edge cases.
* New: Added clear_database_cache() to clear cache when order status changes.