WooCommerce Smart Coupons 8.20.1

* Update: Coupon shareable link not working with page slug or page id
* Update: Ignore usage restriction related to user roles when the coupon is getting applied from admin side
* Update: POT file

* New: Tested up to WooCommerce 5.4.1
* Fix: 1-click coupon apply not working with CheckoutWC
* Fix: WordPress database error Table doesn't exist when referring to users table in a multisite environment [Thanks to: Bradley Cross]
* Update: During manual creation of order from admin side, allow application of coupon that is restricted for user roles
* Update: POT file

* Fix: CRITICAL Uncaught Exception: This coupon is valid for the first order only
* Fix: Incorrect calculation when multiple store credit is applied
* Fix: 'Coupon shareable link' not working, added param 'sc-page' in the shareable link
* Update: Hook 'wc_sc_is_filter_content_coupon_message' to decide whether to filter the content of the coupon message or not, before displaying on the website
* Update: Default arguments for method WC_SC_Coupon_Message::wc_add_coupons_message_in_email [PHP8]
* Update: POT file