Buy One Get One Free 5.4.1

* Add - New condition: Cart subtotal before applying the discount of coupons.

* Fix - PHP Warning: "Creation of dynamic property is deprecated" in PHP 8.2 and later.
* Fix - WooCommerce 9.3 deprecated warnings.
* Fix - The "Exclude sale items" coupon option breaks the "Get the cheapest item for free" promotion type.

* Add - Compatible with WooCommerce 9.3+.
* Fix - The "Gifts Pop-up" content is not refreshed after currency changes.

* Add - Filter to customize the "Available gift notice" placement when the style is WooCommerce Notice.
* Fix - Bug on the multicurrency support for the "Cart subtotal" condition.
* Fix - The "Available gift notice" is not display at correct place on some themes.

* Fix - The "Cart coupons" condition is valid when the coupon codes no longer exist.
* Fix - Coupon code cache is not cleared after coupon updates.

* Add - Compatible with WooCommerce 9.0+.
* New - Filter: wc_bogof_hide_empty_coupon_amount_html
* Fix - The value of the non-BOGO coupons with zero amount is hidden.

* Add - Compatible with WooCommerce 8.9+.
* Fix - Variation dropdowns do not work after refreshing the "Gifts Pop-up" content.

* Fix - PHP error on some themes.

* Fix - Gifts Pop-up - Style issues on some themes.
* Fix - There is no default value for the "Number of columns" option of the customizer.
* Fix - Compatibility issues with the "Advanced Dynamic Pricing for WooCommerce" plugin.

* Fix - The Gift Pop-up applies the esc_html to the product title.
* Fix - "not in" in the "Variation attribute" condition excludes all variations of the same product.