Memory leak when writeStream close/error

Hi @tomas ,

We have tried with below code and file descriptor remains opens.

var os = require('os');
var fs = require('fs');
var path = require('path');
var needle = require('needle');

var url = 'https://sample-videos.com/video123/mp4/360/big_buck_bunny_360p_30mb.mp4';
var output_path = path.join(__dirname, path.basename(url) + Math.random().toString());

var writeStream = fs.createWriteStream(output_path);

var readStream = needle.get(url);
readStream.pipe(writeStream);

setTimeout(function () {
    writeStream.close();
}, 2000);

//to keep the server alive for few mins
setTimeout(function () {
}, 99999999);

We are using needle version 2.4.0, node version v10.15.3 and OS version Ubuntu 16.04.6 LTS

I have checked with lsof -i -n -l -P -s -T qs | grep node command and its remain open.

I think it is very serious memory leak issue if we are using needle in large scale.

Start by running the reproduction snippet with the listed Needle, Node.js, and Ubuntu versions, then inspect how the HTTP read stream and fs write stream behave on close and error. Confirm the file descriptor is released in both cases and add or run a regression test covering the reported lifecycle.