add max transit time

Hi @itaticrushde ,

You should be able to map that out with our plugin, it uses [min_handling_time] & [max_handling_time]: Maximum handling time [max_handling_time], minimum handling time [min_handling_time] – Google Merchant Center Help

See: Screenshot by Lightshot (prnt.sc)

Do note that it’s currently not possible to add sub-attributes, there’s an ongoing request for this so I’ll add a +1 in favor of it being developed but please keep in mind that there isn’t any ETAs