WooCommerce Smart Coupons 8.20.1

* Fix: Fatal Error: Cannot access protected property WC_Coupon:error_message
* Fix: Uncaught TypeError: array_slice(): Argument #1 ($emails) must be of type array, string given
* Update: Replace 'woo.com' with 'woocommerce.com'
* Update: Translations

* Update: Coupon Usage Restriction added max quantity field for 'Product quantity based restrictions'
* Fix: Actions tab product not updating on creating new order
* Update: Translations

* Update: Compatibility with WooCommerce 8.7 for changes in coupon line item storage in the order
* Update: Coupon field 'Original amount' not updating when the coupon is generated via Legacy API
* Update: Save 'Usage restrictions > Taxonomy' detail in the coupons that are generated from 'Marketing > Coupons > Bulk Generate' tab from admin side
* Fix: Store Credit coupon getting included in Subscription renewal orders irrespective of whether it's used or not
* Update: POT, PO & MO file