checkUpdated method
Implementation
Future<bool> checkUpdated() async {
await getAppInfo();
var upd = false;
if (!await Cav.instance.getJsonFile(jsonUrl)) return upd;
final appFile = Cav.instance.appFile;
final packages = [
appFile.androidPackage,
appFile.iOSPackage,
appFile.windowsPackage,
appFile.linuxPackage,
appFile.macOSPackage,
appFile.webPackage,
];
if (!packages.contains(_appPackage)) return upd;
upd = await getAppVersion();
return upd;
}