Product tax category changes should invalidate the order tax data cache

[codyjames]

Description

If a product's tax category changes, it should likely invalidate the order tax data cache.

This would simply involve changing:

commerce-taxjar/src/adjusters/TaxJar.php

Line 127 in 556f1c4

$lineItems = $count . ':' . $item->getOptionsSignature() . ':' . $item->qty . ':' . $item->getSubtotal();

to

$lineItems = $count . ':' . $item->getOptionsSignature() . ':' . $item->qty . ':' . $item->getSubtotal() . ':' . $item->taxCategoryId;