fix: Gradle 7 builds for capacitor 3 as recommended

[riderx]

As say here : https://capacitorjs.com/docs/updating/3-0#update-gradle-to-70
Gradle 7 is the minium version for android, in capacitor 3.

• jcenter become deprecated
• compile have been removed

[pbowyer]

Thank you @riderx for this long-anticipated change!

Could you please rebase your branch against master as Capacitor 3 support has been merged and is now the default.

[riderx]

@pbowyer done !

[riderx]

@pbowyer any news on that ?

[pbowyer]

I've had a mad month with work and not been able to test this yet; hoping March is calmer! Thanks for your patience - and the reminder 👍

[riderx]

@pbowyer hope for you too, it's never good when it last too much !

[pbowyer]

Thanks, tested and it works great 😀

I think this is going to need the next release of camera preview to use a new major version number (v2.0 to v3.0), as everyone must upgrade their Gradle project to use this change. I tested using your PR on a project using Gradle 4 and it broke, so I don't think it is possible to be backwards compatible?

[riderx]

@pbowyer yes it's not backwards compatible