WPSubscription专业版 - WPSubscription为WooCommerce专业版提供订阅服务 1.18.6 pro +1.11.2

* fix: PHP compatibility issue.

* new: Notify store owner when a customer cancels a subscription.
* fix: Guest account creation.
* fix: Guest checkout error.
* update: Email templates.

* fix: Discounted amount was not showing properly.
* fix: API settings were not saving.

* fix: Variation split payment price total in checkout.

* fix: Add to cart validation for variable products.
* fix: Admin table paginations.

* new: Subscription cancellation feedback.
* new: Customize subscription cancellation behavior.

* new: Subscription Switch (Upgrade/Downgrade)
* fix: Subscription details activities.
* fix: Retry renewal.
* security: chart.js asset loading.

* fix: Retry subscription payment from subscription health.
* refactor: Moved settings to the free version.

* new: Delivery Schedules UI.
* new: Reports UI.
* new: Health UI.
* fix: Mollie mandate error for renewals.

* new: Subscription recovery.