onOpened() Call Twice

Description:
onOpened() always call twice while onClosed() only call once. I tested using public method open() and update attribute isOpen to true. It will give same result, onOpened() call twice.

Environment:
What version of the react SDK are you using?
"react": "^16.6.0"

What version of the react-native SDK are you using?
"react-native": "^0.57.4"

What version of the react-native-modalbox SDK are you using?
"react-native-modalbox": "^1.6.0"

How did you add the SDK to your project (eg. npm)
yarn add react-native-modalbox@latest --save

Android Version:
Android Marshmallow 6.0.1

Steps to Reproduce Issue:

1. run react-native init testingmodalbox
2. run yarn add react-native-modalbox@latest --save
3. Implement react-native-modalbox on App.js

<Modal
    onOpened={()=> {console.log('onopened')}}
    onClosed={()=> {console.log('onclosed')}}
    ref={this.modal}
    style={{backgroundColor:'white', height:100, width:330, borderRadius:4, padding:10, elevation:5}}
    swipeToClose={false}
    animationDuration={500}
    position="center"
    backdropPressToClose={false}>

      <View>
        <Text style={styles.welcome}>Welcome to React Native!</Text>
        <Text style={styles.instructions}>To get started, edit App.js</Text>
        <Text style={styles.instructions}>{instructions}</Text>
      </View>
</Modal>

4. Look at log, you will find onopened print twice.

Anyone face the same issue here?

Start with the App.js reproduction using the public open() method and the isOpen attribute, then inspect the modal lifecycle handling for onOpened and onClosed. Done means opening the modal produces one onOpened callback while closing it still produces one onClosed callback; verify this from the logged output.