2018-05-21 releaseBreaking changesChangesProductBreaking changesCategoryAllProducts no longer embed lists of SKUsCheckoutInvoice line items now have unique IDs and can’t be used in place of a subscriptionBilling+ 1 moreCoupons, SKUs, customers, products, and plans now limit the valid characters for IDsBilling+ 1 moreSubscriptions now default to not defining their trial periods depending on a planBillingChanging a subscription to a new plan with a trial now extends the trial periodBilling