WooCommerce FedEx Shipping Method 3.9.2

* Fix - Apply WordPress coding standard.

* Add - Phase out SOAP support.
* Fix - Woo Cart and Checkout Blocks compatibility when plain permalinks are set.

Add - Option to select package type.

* Fix - Package number in debug notification displaying PHP Warning.
* Fix - Invalidate stored Auth key in transient on credentials change.

Fix - Rates cache for SOAP and REST API.

* Fix - Freight shipment incompatibilities with Rate Service version 31.

* Fix - PHP8 Fatal Error on adding item to the cart when Parcel Packing Method is set to "Pack item individually".

* Update - FedEx Rate Service WSDL to version 31.

• End rate request and display cart notice when package count exceeds 9999.
• Checkout error on PHP 8 with virtual products in cart.

* Add - Declared HPOS compatibility.