- New baseline minimum platform is Ubuntu 22.04
- Qt6 requires at least 6.2
- some deprecations may be flagged on later versions (e.g. 6.8)
- CMake requires at least 3.22
- Include build-tests.yml github action to validate builds on mulitple platforms
- QtTest is no longer optional since it easily comes along for the ride with Qt
- Replaced QStringRef in model::SubstitutionField with simple ParserState class
- Removed deprecations up to Qt 6.2
QRcode_clearCache has been deprecated in libqrencode 4.0. In previous versions,
it was only necessary to help debug memory leaks. So it should be harmless
to remove this call.