Extension-iap is using an old version of Google Play Billing

I saw this note from Google: “We’ve detected that this app is using an old version of Google Play Billing. From November 1, 2023, all app updates must use Billing Library version 5 or newer.”

Does anyone know if there is a fork that has an update to support version 5?

Thanks in advance.

I guess, if you need to keep it up-to-date, you have to start contributing to this extension yourself.
This is what I did with extension-admob.

Did anyone fixed this problem ?