iOS: How to change badge number when the app is not running or background?

1. What version of RN and react-native-fcm are you running?
0.53.3/14.1.3
2. What device are you using? (e.g iOS9 emulator, Android 6 device)?
iPhone6(iOS11)
3. Is your app running in foreground, background or not running?
background and not running
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I wanna refresh badge number according to the number of notification when the app is not foreground,
by triggering some method when receiving notifications.

I know I can do it by adding `badge` prop in the data sent from the server, but how to do this just in the client? (or is it impossible?)
`FCM.on` fires only when the app is running.