zoom(int $scale = 100): self
$config = ['path' => './tests'];
$excel = new \Vtiful\Kernel\Excel($config);
$fileObject = $excel->fileName("tutorial01.xlsx");
$fileObject->header(['name', 'age'])
->zoom(200) // 设置工作表缩放系数
->data([
['viest', 21],
['viest', 22],
['viest', 23],
])
->output();