WooCommerce Sequential Order Numbers Pro 1.21.4

* Misc - Add compatibility for WooCommerce 4.7
* Misc - Require PHP 7.0 or newer

* Misc - Remove the SkyVerge help menu item as part of the plugin assets

* Feature - Add onboarding tips for new users
* Misc - Add SkyVerge help menu for support on WooCommerce.com connected sites