_updatePosition(path) {
    let index = Math.round(path.progress * (path.length - 1));

    let position = path.positions[index];

    if (position) {
      path.position = {
        x: this.config.offset.left + position.x,
        y: this.config.offset.top + position.y
      };
    }
  }
_updatePosition
Responsible for updating the paths x / y position.
@private