WooCommerce Smart Coupons 8.22.0

* New: Tested up to WooCommerce 8.1.1
* Fix: PHP Warning: mysqli_free_result(): Couldn't fetch mysqli_result
* Fix: Refund of store credit from order admin page is not working with all possible decimal point
* Tweak: Database query performance optimization
* Update: POT file

* New: Tested with PHP 8.0, 8.1 & 8.2
* New: Tested up to WooCommerce 8.1.0
* New: Tested up to WordPress 6.3.1
* Fix: PHP Fatal error: Uncaught TypeError: str_getcsv(): Argument #1 ($string) must be of type string, array given
* Fix: PHP Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, class SA_WC_Compatibility_4_4 does not have a method 'save_shortcode_generated_coupon'
* Fix: PHP Fatal error: Uncaught TypeError: Unsupported operand types: string + string
* Fix: PHP Fatal error: Uncaught TypeError: Unsupported operand types: int + string
* Fix: PHP Warning: foreach() argument must be of type array|object, string given

* New: Tested up to WordPress 6.3.0
* New: Tested up to WooCommerce 8.0.2
* Fix: When a coupon that is having some products set under 'Coupon actions', is tried to be applied using 'Coupons shareable link', that coupon is being applied without validating the coupon This results in an additional coupon validation error notice
* Fix: Coupons are losing style when tried to print on Mozilla Firefox browser
* Update: POT file