WooCommerce Smart Coupons 9.18.0

* New: Tested upto WooCommerce 4.6.1 & WordPress 5.5.3
* New: Usage restriction to exclude user roles
* New: Feature to select quantity of the products which will be added to cart on applying a coupon (under Coupon data > Actions tab)
* Fix: Incorrectly showing description of one coupon as description of other coupons
* Fix: Remove unnecessary CSS from styles of coupons which are going in the email
* Update: sample.csv file
* Update: POT file

* New: Allow linking of coupon to variations as well
* Developer: Hook 'wc_sc_is_filter_content_coupon_message'
* Update: Highlight Smart Coupons' field under product
* Update: Coupon design templates for handling empty coupon amount
* Update: API namespace
* Update: POT file

* New: Tested upto WooCommerce 4.6.0
* New: API support for generating coupons
* Fix: Incorrectly overriding 'custom-design' for coupon on saving the settings
* Fix: Incorrectly adding 'is_email' attribute when adding shortcode using WP editor button
* Fix: Reduce multiple AJAX request on the cart & the checkout page to one (happens only in some cases) (Thanks to: BuildWooFunnels)
* Fix: Links added in the message, which will be sent along with the coupon, those links are broken in the received email
* Update: Display store notice for coupon based on the coupon's status
* Update: Provide support for selecting order statuses to consider during the validation of new user coupons
* Developer: Hook 'wc_sc_should_coupon_auto_generate'
* Update: POT file