LearnDash LMS Easy Digital Downloads Integration Addon 1.4.0

* Feature: add support for EDD pro.
* Feature: add variable pricing support for LearnDash course and group enrollment.
* Tweak: change course and group selector select fields to select2.
* Tweak: add EDD settings section on LD advanced settings page.
* Feature: add retroactive tool based on EDD purchase and subscription.
* Feature: add subscription completed handler and filter hook that allows access removal.
* Fix: users don't get access to LD course/group after completing purchase using unregistered user.
* Fix: variable product course selector doesn't work because of selector change in EDD 3.0.
* Feature: add user cancelled subscription check for expired subscription.
* Tweak: add backward compatiblity with LD EDD <= 1.3.0 for variable products.
* Feature: add subscription failing hook handler.
* Fix: fix course access is given on any subscription update action.
* Tweak: add compatibility with EDD free downloads extension.

* Added LearnDash group support
* Updated user course access is attched to each product rather than the overall order allowing refunds of individual products whilst retaining access to others
* Updated updating product’s related courses will update existing customers course access
* Fixed PHP warnings
* Fixed broken metabox styling

• Added check expired transaction status when removing course access
• Fixed issue where user is not removed from course on payment status change
• Fixed course unenrollment issue

* Fixed activation error