PHP: usage of null coalescing operator breaks PHP 5.6 support #44
Description
Beginning on line 274:
'LV2_ITEM_TAX_RATE' => $params['taxRate'] ?? ''
Usage of the double question mark (null coalescing operator) is only supported on PHP 7 and higher, so any sites running 5.6 will not be able to use this code. If that is the intended behavior, then I can just update my version to not use the operator, but thought I'd bring this up in case anyone asks in the future. Thanks!