title: How to broadcast push notification to multiple devices using react-native-push-notification and Firebase?
body: <p>I want to broadcast notification to multiple devices instead of adding FCM token of each device. Currently, I am sending notification using Firebase cloud messaging to send a notification but in that, I have to add FCM client token for each device, but what I want is to broadcast message without collecting client device FCM Token.</p>
  
  <p>Following versions are being used in my app
  '''
  "react-native": "0.55.4",
  "react-native-push-notification": "^3.1.3",
  '''</p>