WooCommerce Smart Coupons 8.20.1

* Fix: 'Exclude attributes' restriction overriding 'Exclude categories' restriction
* Fix: 'Max discount' is not getting calculated properly in case of WooCommerce setting for a decimal value other than 2
* Fix: Setting 'Disable email restriction' not working in case of coupons scheduled to be sent at a later date
* Fix: Purchased coupons that are scheduled to be sent later via email, are not getting emailed in some cases
* Fix: Removed unnecessary 'console.log'
* Fix: HTML & CSS of add & remove button of 'Taxonomy' restrictions for responsiveness
* Update: Display details of scheduled coupons in order under 'Generated coupons' meta box
* Update: POT file

* 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