* New: support for WooCommerce 5.0
* Update: YITH plugin framework
* Fix: fixed the generation and attachment of the credit notes in the partially refunded orders
* Fix: id codice value for not private customer that are not italian
* Fix: value for "Natura" in according to country
* Dev: added new filter ywpi_checkout_receipt_ssn_mandatory
* Dev: loading the frontend styles only in the checkout