filehandle.utimes(atime, mtime)

• atime <number> | <string> | <Date>
• mtime <number> | <string> | <Date>
• 返回：<Promise>

更改 <FileHandle> 所引用对象的文件系统时间戳，成功时不带任何参数地完成承诺。

【Change the file system timestamps of the object referenced by the <FileHandle> then fulfills the promise with no arguments upon success.】