WooCommerce货币转换小部件 2.2.10

* Fix - Avoid a fatal error on block themes when another plugin prevents the currency converter widget from initializing

* Fix - Keep prices in the selected currency after applying or removing a coupon on the classic cart and the Cart/Checkout Block

* Tweak - Add a setting to control whether converted prices use locale-specific or global store formatting
* Fix - Fix zero-trimming corrupting converted prices for currencies that use a different decimal separator than the store

* Fix - Ensure that the currency converter works when output as shortcode in some FSE themes

* Tweak - Backup rates to an option in case the transient fails before the expected expiration time

* Fix - Address a bug at checkout when orders contain converted currency information

* Tweak - Only load assets when widget or shortcode exist on page and plugin is configured.
* Tweak - Add an attribute to the widget currency options to instruct browsers to not translate the currency codes within
* Misc - Require PHP 7.4 or newer

* Tweak - Tested compatibility up to WC 8.6.
* Fix - Fixed the currency geolocation on stores with page cache.

* Fix - Fixed issue when loading the currencies locales.

* Feature - Added template to customize the widget content.
* Tweak - Updated the plugin URLs to the new woo.com domain.
* Tweak - Tested compatibility up to WC 8.4.
* Dev - Dropped deprecated code up to version 2.1.0.
* Dev - Dropped deprecated `WC_Currency_Converter_Privacy` class.