WooCommerce Smart Coupons 9.18.0

* Fix: Auto-generating coupons is not copying the 'Product quantity based restrictions' from parent coupon
* Update: Handle sequence of application of store credit when 'Apply before tax' is enabled
* Update: Restrict the enqueue of Smart Coupons' JavaScript code to only required places
* Update: Convert the jQuery code to native JavaScript code
* Update: Translations

* Update: Improvements to the coupon discount calculations at order level when 'Apply before tax' is disabled
* Update: Translations

* 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