LearnDash LMS WooCommerce Integration Addon 2.0.1

* Added group access update functions
* Added group selector field in WooCommerce edit product page
* Added filter hook to reset subscription course access from
* Added filter hook to configure silent course enrollment queue processing count
* Fixed add array typed variable to prevent PHP warning error
* Fixed param check logic to prevent fatal error

* Added subscription parameter to remove course on billing cycle completion filter hook
* Added filter hook to customize retroactive tool per batch value so users can change it depending on their server specifications
* Added process enrollment queue 1 at a time to prevent timemout error
* Added WC requires and tested headers
* Added silent course enrollment feature to prevent long loading time in products with many associated courses
* Added reduce minimum products count for background course enrollment because it caused timeout error
* Updated plugin name and description to match with other addons
* Updated change assoicated course field label
* Fixed fatal error `WC_Order_Refund` object not having `get_customer_id()` method `use get_user_id()` instead
* Fixed CSS issue where `select2` dropdown is missing
* Fixed learndash WooCommerce cron hook not registered

• Added COD payment method to manual payment method
• Added filter hook for course selector class name
• Added convert retroactive tool cron job to AJAX batch processing
• Added filter hook for auto complete order
• Added payment_complete hook to auto complete transaction
• Added reset course access counter function and reset access counter when user is already enrolled
• Added set course access from value from the start of a subscription instead of resetting it
• Added “any” param to subscription function to get all subscription orders
• Added make tax fields visible for course product type
• Updated adjust select2 JS and CSS to hide select field on initial load
• Updated change courses selector to use select2 to allow search and select UI
• Updated change variable name for subscriptions related hook function
• Updated virtual and downloadable product as auto-complete item
• Updated slug in translation class
• Updated lower per batch tools value to 10
• Updated null coalescing operator to make the plugin compatible with PHP < 7
• Updated check if order has been paid before being auto completed
• Updated load text domain function
• Updated skip order that is part of subscription in retroactive tool
• Fixed add course selector border CSS to override LD core styles
• Fixed hook for learndash_delete_user_data function
• Fixed variation product subscription cancellation didn’t unenroll users from courses
• Fixed undefined index error warning
• Fixed remove access on order refund for variable product
• Fixed variation product autocomplete bug
• Fixed AJAX retroactive tool
• Fixed change text domain
• Fixed fatal error because wcs_order_contains_subscription() only accepts WC_Order object