Promise with Tween of Cocos Creator

onLoad()
{
this.moveTo(this.cursor, 1, cursorToStopBtn)
            .then(() => this.bouncing(this.stopButton, 1.1, 4) )
            .then(() => this.moveTo(this.cursor, 1, cursorToInfoBtn))
            .then(() => this.bouncing(this.infoButton, 1.1, 4));
}

private moveTo(anyNode: cc.Node, duration: number, toPosition: cc.Vec2): Promise<unknown>
    {
        return new Promise((resolve, reject) =>
        {
            cc.tween(anyNode)
                .to(duration, { position: toPosition })
                .call(resolve)
                .start();
        });
    }

private bouncing(node: cc.Node, scaleRate: number, repeat: number)
    {
        return new Promise((resolve, reject) =>
        {
            repeat = Math.max(1, repeat);
            cc.tween(node)
                .repeat(repeat, cc.tween()
                    .to(0.5, { scale: scaleRate })
                    .to(0.5, { scale: 1 })
                )
                .call(resolve)
                .start();
        });
    }