普通耗时函数写成promise写法

异步函数转换成promise写法

function getArrayData (pathFile) {  return new Promise(function (result) {    const fileStream = fs.createReadStream(pathFile);    const allDatas = [];    csv    .fromStream(fileStream, {      headers: true    })    .on('data', (data) => {      allDatas.push(data);    })    .on('end', async () => {      result(allDatas);    });  });}