* Tweak - Declare compatibility with WooCommerce High-Performance Order Storage (HPOS).
* Tweak - Tested compatibility up to WC 7.2.
* Tweak - Tested compatibility with WP 6.1.
* Feature - Automatically subscribe customers to AWeber during checkout.
* Tweak - Added an auto-subscribe option to the checkout rules.
* Tweak - Display the subscription field during checkout only when there are optional checkout rules available.
* Tweak - Tested compatibility with WC 6.9.
* Feature - Subscribe the customers to the registration list when creating an account during checkout.
* Tweak - Display the subscription field during checkout only when needed.
* Tweak - Added the IPv6 address '::1' to the list of local IP addresses.
* Tweak - Tested compatibility with WC 6.8.
* Tweak - Tested compatibility up to WC 6.7.
* Tweak - Tested compatibility up to WP 6.0.
* Tweak - Check the PHP version before initializing the plugin.
* Tweak - Tested compatibility up to WC 6.5.
* Fix - Fixed compatibility issue for PHP 8.1.
* Dev - Use a trait instead of a class for implementing the Singleton pattern.
* Dev - Bump minimum required PHP version to 5.4.
Fix - Fixed migration to update the setting product tags from the checkout rules.
* Feature - Tag the subscribers with the purchased products.
* Tweak - Tested compatibility with WC 6.2.
* Tweak - Include the setting 'Subscribe on order statuses' in the System Status report.
* Tweak - Tested compatibility with WC 6.1.
* Tweak - Tested compatibility with WP 5.9.