memfs.createWriteStream() exists, while filehandle.createWriteStream() doesn't

[fautore]

Hi Folks,
i noticed that #5 mentions that memfs.createWriteStream() works as intended.
however i was reading the official node documentation at https://nodejs.org/api/fs.html#filehandlecreatewritestreamoptions and apparently the same createWriteStream() can be called on a file descriptor generated by fs.open().

while this is not a huge issue, are there any plans to align to the node API?
thank you.