【报Bug】云函数uni-pay-co验证iosIap苹果内购支付凭据中pay_date数据类型错

示例代码：

    let {  
        out_trade_no,  
        transaction_receipt,  
        transaction_identifier,  
    } = data;  
    if (!out_trade_no) {  
        throw { errCode: ERROR[51001] };  
    }  
    // 初始化uniPayInstance  
    let uniPayInstance = await this.initUniPayInstance({ provider: "appleiap", provider_pay_type: "app" });  
    let verifyReceiptRes = await uniPayInstance.verifyReceipt({  
        receiptData: transaction_receipt  
    });  
    let userOrderSuccess = false;  
    let pay_date = 0;  
    if (verifyReceiptRes.tradeState !== "SUCCESS") {  
        throw { errCode: ERROR[54002] };  
    }  
    // 支付成功  
    pay_date = Number(verifyReceiptRes.receipt.receipt_creation_date_ms);

操作步骤：

IOS内购成功后，查看表uni-pay-orders的pay_date字段即可

预期结果：

时间戳

实际结果：

字符串