can't animate series value (percentage) using Animated, why? about react-native-pie HOT 5 CLOSED

class PieDemo extends Component {
  render() {
    return (
      <View style={styles.container}>
        <View>
          <Pie
            radius={150}
            innerRadius={145}
            series={[this.props.series]}
            colors={['#f00']}
            backgroundColor='#ddd' />
          <View style={styles.gauge}>
            <Text style={styles.gaugeText}>60%</Text>
          </View>
        </View>
      </View>
    )
  }
}

const AnimatedPieDemo = Animated.createAnimatedComponent(PieDemo)
...
<AnimatedPieDemo series={this.state.progress}/>
...