Many of you will have received the following notice from Google over the previous months:
Reminder
Starting on August 2, 2022, all new apps must use Billing Library version 4 or newer. By November 1, 2022, all updates to existing apps must use Billing Library version 4 or newer.
We are excited to announce that version 14 of the InAppBilling extension brings v5.0.0 of the Billing library so you will be able to update your applications before the November deadline for updates.