InAppPurchase Outdated

Hello,
When trying to upload my game to the Play Store, I got the following error:

We’ve detected that this app uses an unsupported version of Play Billing. Please upgrade to Billing Library version 4 or newer to publish this app.

Looking into it more, Google says that “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.”

So I was wondering whether the InAppPurchase extension is going to be updated soon, and if not whether there is a manual workaround I could do.

Thank you!