Incorrect type definitions for attachments

[peperoli]

The attachments property accepts File and Blob:

export type MessageAttachment = CustomFile | CustomFile[] | File | File[] | string | CustomFileData | CustomFileData[];

But it's not (properly) implemented, passing a File object will cause a TypeError: source.on is not a function at Function.DelayedStream.create, the same happens for Blob as mentioned in #254. Buffer works, so the type definition should be updated accordingly.

[olexandr-mazepa]

Hello @peperoli
Could you add more details on the issue?

• What version of Node.js do you use?
• Do you use built in FormData or package one?
  Minimal reproducible example would be appreciated.
  Thank you in advance.