* Add-Improved stability

PLUGINS-800-Fix-Fix bugs and improvements on Suppliers Email Notification

* Fixed: Product Add-ons issue: duplicate add-ons in the free product for the rule “Buy a product and get the same product for free.”
* Fixed: Add the Minimum spend field to the wmpl config file.
* Fixed: RTL support for the “arrow” shown in the subtotal of items that have a discount.

* Fix-Support for the upcoming changes to WooCommerce admin navigation sidebar.
* Tweak-WC 4.7 compatibility.
* Tweak-WP 5.6 compatibility.

* Full details: https://om4.io/?p=19959
* New: Compatibility with PHP 8. #368
* Fix: Deprecated warning that occurs on PHP 8 for the `OM4\WooCommerceZapier\TaskHistory\Task` constructor. #368
* Change: Send `X-WordPress-GMT-Offset` HTTP header during webhook deliveries to Zapier to help improve date/time timezone conversion reliability in Zaps. #362
* Change: Improved handling of Task History messages so that they correctly show the trigger rule and View/Edit Zap link after the corresponding Zap has been turned off. #307
* Change: Improved Authentication error messages. PR #350
* Change: Marked as compatible with WooCommerce 4.7.

* Tweak-Improved PHP 8 support.
* Tweak-Tested compatibility with WC 4.8.
* Tweak-Tested compatibility with WP 5.6.
* Fix-Fixed “What’s new” link on the plugin list page.

* Fix-Don’t show the “(includes|excludes tax)” message next to the Future Payments price when there are no taxes applied to the cart. PR#365
* Tweak-PHP 8.0 and WC 4.4 compatibility. PR#362