WP Plugins WooCommerce Order Tags 2.2.0

* Note: This is a milestone release, please ensure you read the contents of this changelog and we recommend performing this upgrade on a staging environment and testing before upgrading the extension on a production website, clear all caches after upgrading
* Added: Text color option on order tags
* Added: wcot_order_tags_color_text_default() filter hook
* Added: wcot_order_tags_set_if_product_variations() filter hook to allow product variations to be selected in set if product assignment when returned true
* Added: Additional class with order tag slug append to order tag html
* Added: Set if product variations information when managing order tags
* Changed: Renamed existing color option to background due to new text color option
* Fixed: Set if fields which return results via AJAX can not be searched like non-AJAX fields