readline.cursorTo(stream, x[, y][, callback])
- 
stream<stream.Writable> - 
x<number> - 
y<number> - 
callback<Function> 操作完成后调用。¥
callback<Function> Invoked once the operation completes. - 
返回:<boolean>
false(如果stream希望调用代码在继续写入附加数据之前等待'drain'事件触发);否则true。¥Returns: <boolean>
falseifstreamwishes for the calling code to wait for the'drain'event to be emitted before continuing to write additional data; otherwisetrue. 
readline.cursorTo() 方法将光标移动到给定的 TTY stream 中的指定位置。
¥The readline.cursorTo() method moves cursor to the specified position in a
given TTY stream.