Update Google Play Billing Library to version 5

[suit-up-repos]

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." Looks like this repo needs to be updated to Billing Library version 5.

[Hitek55]

waiting for updates

[pozirk]

Stop waiting guys, if you need it, you should start fixing it yourselves.
I can merge your requests.

[Hitek55]

I made a beta version of the update here, test purchases work, I haven’t checked it anymore, who needs it, you can read it, if there are errors, then let me know about them so that I know what to fix.

[pozirk]

Thank you @Hitek55!
Can you submit a pull request?

[Hitek55]

Here are some more fixes, I just forgot to commit them.
I'm not sure yet that this is working correctly as it should be.
There is no time to create a merge request yet, if someone needs it, let them take these 2 commits.

charmdev@ec858a5

charmdev@69cc962

[slabgames]

Has it been updated to v5? @pozirk

[pozirk]

Nope, no one updated anything.

[pozirk]

@flashultra updated the extension to the Google Play Billing Library v6.
Everyone is welcome to try it and report any issues.