WooCommerce Pre-Orders 2.2.0

Download WooCommerce Pre-Orders 2.2.0 from nulled fire. Allow customers to order products before they are available.
* Fix - Prevent error if pre order becomes disabled before payment has been made.
* Fix - Removed line item modification for WC3.0+ that could cause issues in some cases.
* Fix - Zero cost pre-orders were not processed correctly.
* Fix - Using pay later, payment process does not go through.
* Fix - In rare cases, orphaned order metas causing canceled/completed pre orders to still show active.
* Add - Staging/test disable automated pre order processing option.