Support for async-std about multer-rs

[rousan]

Hey @dbrgn , there is nothing to do with async-std or tokio for the core features provided by multer. You have provided a wrong argument to the Multipart ::new() method as described in the compiler error message.

The Multipart::new() accepts a stream of Bytes as described here.

First convert the body.bytes() to a stream of Bytes as below:

use bytes::Bytes;

let data: &[u8] = body.bytes();

// Convert your data to a stream of Bytes.
let stream = futures::stream::once(async move { Result::<Bytes, Infallible>::Ok(Bytes::from(data)) });

let multipart = multer::Multipart::new(stream, boundary);

[dbrgn]

Ah, perfect, thanks @rousan!