WooCommerce Smart Coupons 9.18.0

* New: Tested upto WooCommerce 4.7.1, 4.8.0 & WordPress 5.6.0
* New: Coupon usage restrictions for various product taxonomies
* Update: Support for modifying the input field provided for those products which allows purchasing store credit of any amount
* Update: Better handling of validation of the input field for those products which allows purchasing store credit of any amount
* Update: Pass the expiry date through a common formatting function on the Smart Coupons admin setting page
* Update: CSS for coupon location field
* Update: POT file

* Fix: Uncaught ReferenceError: sc_coupon_message_ajax is not defined
* Fix: Uncaught ReferenceError: sc_available_coupons_ajax is not defined
* Update: POT file

* New: Tested upto WooCommerce 4.6.2
* Fix: Email not sending for purchased coupons which are scheduled to be sent 'LATER'
* Fix: Not checking order statuses while validating new user coupon in the case of guest users
* Fix: Sometimes showing fatal error if a coupon which is about to be displayed is deleted
* Fix: Uncaught Error: Using $this when not in object context from 2 templates: email.php & combined-email.php
* Fix: JavaScript error: Trying to declare the variable a second time
* Update: Hook 'wc_sc_max_coupon_to_show_on_myaccount' & setting 'wc_sc_setting_max_coupon_to_show_on_myaccount'
* Update: Limit on the number of coupons to be loaded in the coupons tab on the my account page
* Update: Improvements in coupon tabs on the my account page such that segments will get loaded only if it has some data
* Update: Use coupon setting 'Exclude sale items' during generation of coupon description
* Update: Set the position of Print button to right on my account page
* Update: Minor change in logic of displaying coupon to ensure correct number of coupons to display as per setting
* Update: POT file