resetFlip() {
    return this._flip('reset');
  }
Reset flip
@returns {Promise<FlipStatus, ErrorMsg>}
@example
imageEditor.resetFlip().then(status => {
    console.log('flipX: ', status.flipX);
    console.log('flipY: ', status.flipY);
    console.log('angle: ', status.angle);
}).catch(message => {
    console.log('error: ', message);
});;