add delayed refresh token message

ios/RNFIRMessaging.m

@@ -229,6 +229,7 @@ RCT_MULTI_ENUM_CONVERTER(UNNotificationCategoryOptions, (@{
 
 static bool jsHandlerRegistered;
 static NSMutableArray* pendingNotifications;
+static NSString* refreshToken;
 
 RCT_EXPORT_MODULE();
 
@@ -326,6 +327,9 @@ RCT_EXPORT_MODULE();
         if(!jsHandlerRegistered){
             [self sendPendingNotifications];
         }
+        if(refreshToken != nil){
+            [self sendEventWithName:FCMTokenRefreshed body:refreshToken];
+        }
     });
     
     return self;
@@ -336,6 +340,9 @@ RCT_EXPORT_MODULE();
     
     if([eventName isEqualToString:FCMNotificationReceived]) {
         [self sendPendingNotifications];
+    } else if([eventName isEqualToString:FCMTokenRefreshed] && refreshToken != nil) {
+        [self sendEventWithName:FCMTokenRefreshed body:refreshToken];
+        refreshToken = nil;
     }
 }
 
@@ -449,6 +456,7 @@ RCT_EXPORT_METHOD(deleteInstanceId:(RCTPromiseResolveBlock)resolve rejecter:(RCT
 }
 
 - (void)messaging:(nonnull FIRMessaging *)messaging didRefreshRegistrationToken:(nonnull NSString *)fcmToken {
+    refreshToken = fcmToken;
     [self sendEventWithName:FCMTokenRefreshed body:fcmToken];
 }