[firebase_messaging] Latest Stable (7.0.0) still depends on Core 0.5.0

[Vayth]

That makes it incompatible with other flutterfire such as crashlytics latest stable.
I see that 8.0.0dev is using Core 0.7, but since we're talking about stable release for production, won't it better to have 7.0.1 or something be released, that depends on the Core latest stable?
Seems like some method like onIosSettingsRegistered is removed in 8.0.0dev.