Request to support for ScreenBreakPoints 'num' Type

[Kim Jiun]

Hello!,
I would like to request you to support the num type . (Don't stick to the double.)

Model code

class _ScreenBreakPoints {
  num desktop = 1024;
  num tablet = 775;
  num watch = 200;
}

Controller code

// getter
  num get desktop_breakpoint => app.screenBreakpoints.desktop;
  num get tablet_breakpoint => app.screenBreakpoints.tablet;
  num get watch_breakpoint => app.screenBreakpoints.watch;

// constuctor
  Controller() {
    ResponsiveSizingConfig.instance.setCustomBreakpoints(ScreenBreakpoints(
        desktop: desktop_breakpoint,
        tablet: tablet_breakpoint,
        watch: watch_breakpoint));
  }

Thanks!