colors don't update

[lukepighetti]

When theme brightness changes, the colors do not change

1. start in light mode
2. controller.play()
3. observe red
4. switch brightness to dark
5. controller.play()
6. observe red (expected blue) # <<<<<

return ConfettiWidget(
  colors: switch (Theme.of(context).brightness) {
    Brightness.light => [
        Colors.red,
      ],
    Brightness.dark => [
        Colors.blue,
      ],
  },
);