【报Bug】创建项目勾选Vue3版本发现longpress 长按返回的event 缺少touches字段

示例代码：

测试代码：

<template>  
    <view class="content">  
        <image class="logo" src="/static/logo.png"></image>  
        <view class="text-area" @longpress="longPress">  
            <text class="title">{{title}}</text>  
        </view>  
    </view>  
</template>  

<script>  
    export default {  
        data() {  
            return {  
                title: 'Hello'  
            }  
        },  
        onLoad() {  

        },  
        methods: {  
            longPress(e){  
                console.log('testEvent',e)  
            }  
        }  
    }  
</script>

Vue3项目longpress event返回：

{  
    "type": "longpress",  
    "timeStamp": 167209.59999999776,  
    "target": {  
        "id": "",  
        "dataset": {  
            "v-1cf27b2a": "",  
            "v1cf27b2a": ""  
        },  
        "offsetTop": 240,  
        "offsetLeft": 178  
    },  
    "detail": {},  
    "currentTarget": {  
        "id": "",  
        "dataset": {  
            "v-1cf27b2a": "",  
            "v1cf27b2a": ""  
        },  
        "offsetTop": 240,  
        "offsetLeft": 178  
    },  
    "__instance": true  
}

Vue2项目 longpress event返回：

{  
    "@warning": "mp is deprecated",  
    "type": "longpress",  
    "timeStamp": 8296.699999999255,  
    "detail": {},  
    "target": {  
        "id": "",  
        "offsetLeft": 167,  
        "offsetTop": 225,  
        "dataset": {}  
    },  
    "currentTarget": {  
        "id": "",  
        "offsetLeft": 167,  
        "offsetTop": 225,  
        "dataset": {}  
    },  
    "touches": [  
        {  
            "identifier": 0,  
            "pageX": 186.73828125,  
            "pageY": 239.828125,  
            "clientX": 186.73828125,  
            "clientY": 239.828125,  
            "force": 1  
        }  
    ],  
    "changedTouches": [  
        {  
            "identifier": 0,  
            "pageX": 186.73828125,  
            "pageY": 239.828125,  
            "clientX": 186.73828125,  
            "clientY": 239.828125,  
            "force": 1  
        }  
    ]  
}

操作步骤：

1）打开HBuilderx 选择创建项目勾选vue3版本。
2）在空白项目中绑定一个longpress事件，并输出所绑定方法的形参。
3）运行至浏览器打开控制台，并选择移动端模式，长按事件观察返回。
vue2同上

预期结果：

预期vue3中返回字段与vue2longpress一致，包含touches字段以及下属内容。

实际结果：

实际结果vue3 longpress事件不包含touches字段