add support for endroid/qr-code version 6

[cliffordvickrey]

Feature added

Updated EndroidQrCodeProvider to work with version 6 of optional endroid/qr-code repository. (Breaking change in dependency: setter methods removed in favor of more modern practice of passing properties to QrCode constructor)

Testing

Confirmed that EndroidQRCodeTest passes with either version 5 or 6 of endroid/qr-code installed

[willpower232]

Thanks for your help, can you also add 6 to .github/workflows/test-endroid.yml to ensure it gets tested?

[cliffordvickrey]

Thank you for looking at this so quickly! ^6 has been added to the list of tested package versions

[NicolasCARPi]

I suggest dropping versions 3 and 4 from our code/test. No need to try and be compatible with php 5.6 era libraries. Not necessarily in this PR, but adding support for a new version should come with dropping support for the oldest one, too. Or you end up with too many codepaths, maintenance cost, attack surface, etc...

[willpower232]

Its no skin off my back, they do still install on PHP 8 though so we'd have to add a conflicts in composer.json to reject those versions right?

Probably easier to pull off next year with PHP 9 😅