Progress.Circle在使用中，有两个异常 1.切换颜色会导致部分边角颜色还是上一个颜色。2.更改进度条进度不立即刷新。

[Xiiyy]

progress库依赖SVG提供的能力，待SVG整改
demo参考：

    <Text style={styles.welcome}>Progress Circle progress</Text>
    <View style={styles.circles}>
      <Progress.Circle
        style={styles.progress}
        progress={progress}
      />
      <Progress.Circle
        style={styles.progress}
        progress={progressCircle}
        animated={false}
      />
    </View>
    <View style={styles.view}>
      <Button
        title="0%"
        onPress={progressCircleCounter0}
      />

      <Button
        title="10%"
        onPress={progressCircleCounter1}
      />

      <Button
        title="50%"
        onPress={progressCircleCounter5}
      />

      <Button
        title="70%"
        onPress={progressCircleCounter7}
      />

      <Button
        title="100%"
        onPress={progressCircleCounter10}
      />
    </View>

    <Text style={styles.welcome}>Progress Circle color</Text>
    <View style={styles.circles}>
      <Progress.Circle
        style={styles.progress}
        borderWidth={5}
      />
      <Progress.Circle
        style={styles.progress}
        borderWidth={5}
        color={color}
      />
    </View>
    <View style={styles.view}>
      <Button
        title="Red"
        onPress={colorCounterRed}
      />

      <Button
        title="Green"
        onPress={colorCounterGreen}
      />

      <Button
        title="Blue"
        onPress={colorCounterBlue}
      />

      <Button
        title="Yellow"
        onPress={colorCounterYellow}
      />
    </View>