Update FlingGestureHandler on iOS (#1612)
Update FlingGestureHandler on iOS (#1612)

Update FlingGestureHandler on iOS to include BEGAN in its state flow.
kmagiera/react-native-gesture-handler,kmagiera/react-native-gesture-handler,kmagiera/react-native-gesture-handler,kmagiera/react-native-gesture-handler,kmagiera/react-native-gesture-handler