* Fix - Correctly determine subscription free shipping eligibility when the initial payment cart isn't eligible. Fixes erroneous "Invalid recurring shipping method" errors on checkout. #409
* Dev - Fixed precision loss notice that occurs when running PHP 8.1. #428
* Dev - Fix phpcs and semgrep warnings to improve code quality. #429
* Dev - Use `wp_safe_redirect()` when processing a payment method change request. #429