Can we have something like `FlavorConfig.instance.setValue('key','value')`

[kateile]

This package is amazing however I have came across a scenario where I wish setValue option would be available.

void main() {
  FlavorConfig(
    flavorName: 'prod',
    bannerEnabled: false,
    values: {
      'apiBaseUrl': 'https://prod.example.com/api',
    },
  );

//Assume Some nested widgets tree here and value could not be added above

//Before runApp
FlavorConfig.instance.setValue('key','value');

//and then
  runApp(MyApp());
};