Deno support

[LiviaMedeiros]

For initial compatibility with Deno, the following incompatibilities with Node.js API have to be solved:

• fs.writeFile(_, body, _) doesn't accept ReadableStream as body
• fd.write(chunk, { length, position } signature is not supported
• filehandle[Symbol.asyncDispose] is not defined
• Request instance properties, integrity in particular, are ignored by constructor and fetch (which is security issue tbh)
• ReadableStream.from() is not implemented (tbf it's too fresh)
• fd.read() signature is... I don't get it rn
• fs.fileAppend(_, body, _) doesn't accept ReadableStream as body either
• fd.readableWebStream() is not supported