*** FedEx Changelog ***
2024-01-02 - version 3.8.7
* Fix - Package number in debug notification displaying PHP Warning.
* Fix - Invalidate stored Auth key in transient on credentials change.
2023-12-11 - version 3.8.6
* Fix - Rates cache for SOAP and REST API.
2023-10-03 - version 3.8.5
* Fix - Compatibility with Per Product Shipping.
* Fix - Compatibility with Avalara AvaTax.
2023-09-05 - version 3.8.4
* Fix - Compatibility with plugins that use Shipping Zone shipping methods.
* Tweak - PHP 8.2 compatibility.
2023-08-17 - version 3.8.3
* Fix - No FedEx rates in WooCommerce shipping cache.
2023-07-31 - version 3.8.2
* Fix - FedEx One Rate not being returned when using REST API.