* Tweak-WC 7.0 compatibility.

* Dev-Add linting, unit and e2e test coverage within GitHub Actions.
* Add-Support for High-performance Order Storage (“HPOS”) (formerly known as Custom Order Table, “COT”).

* Tweak-Check the minimum requirements before initializing the plugin.
* Tweak-Added links to the plugin settings, documentation and to get support in the plugin list.
* Tweak-Tested compatibility up to WC 7.0.
* Tweak-Tested compatibility up to WP 6.0.
* Fix-Fixed fatal errors when generating the catalog PDFs in PHP 8.0 or higher.
* Dev-Updated Dompdf library to version v2.0.1.
* Dev-Updated the minimum requirements to WC 3.5, WP 4.7, and PHP 7.1.

* Fix MPDF temp folder
* Fix pdf_template_order_totals filter
* Remove refund from get_pdf_order_totals

* Misc-SmartyStreets retirement