fix: avoid destructure under error

lib/youtube-dl.js

@@ -20,9 +20,9 @@ let ytdlBinary = require('./get-binary')()
 const execa = universalify.fromPromise(require('execa'))
 
 function youtubeDl (args, options, cb) {
- return execa(ytdlBinary, args, options, function done (err, { stdout }) {
+ return execa(ytdlBinary, args, options, function done (err, output) {
  if (err) return cb(err)
- return cb(null, stdout.trim().split(/\r?\n/))
+ return cb(null, output.stdout.trim().split(/\r?\n/))
  })
 }
 
@@ -47,7 +47,12 @@ function processData (data, options, stream) {
  headers.Range = 'bytes=' + options.start + '-' + options.end
  }
 
- const req = request({ url: item.url, headers: headers, ecdhCurve: 'auto', timeout: 30000 })
+ const req = request({
+ url: item.url,
+ headers: headers,
+ ecdhCurve: 'auto',
+ timeout: 30000
+ })
 
  req.on('response', function response (res) {
  const size = parseInt(res.headers['content-length'], 10)