* Fix - Display the correct cart item subtotal when a customer adds more than a discounted subscription product to cart
* Fix - Address a potential issue in the shipping handler
* Fix - Add sanity checks before calling Sensei or LearnDash methods to avoid errors if old versions are installed
* Fix - Address a potential uncaught error in Sensei and LearnDash integrations when fetching dependent courses
* Feature - Auto-enroll users to Sensei and LearnDash courses upon membership purchase
* Dev - Add meta data handling support to membership plan rule objects
