Update level-iterator-stream to the latest version 🚀

[greenkeeper]

The dependency level-iterator-stream was updated from 3.0.1 to 4.0.0.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

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[ralphtheninja]

I might have jumped the gun on this one. Waiting for results on Travis.

[ralphtheninja]

Seems like we have some potential issues

- waiting: <internet explorer 10 on Windows 2012>
2018-12-17T11:32:51.058Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:32:51.307Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:32:51.307Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:32:53.309Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:32:53.598Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:32:53.598Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:32:55.600Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:32:55.842Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:32:55.842Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:32:57.845Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:32:58.085Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:32:58.085Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:00.087Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:01.348Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:01.348Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:05.620Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:05.881Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:05.881Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:10.199Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:10.501Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:10.502Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:12.504Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:12.761Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:12.761Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:14.763Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:15.036Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:15.036Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:17.038Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:17.306Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:17.306Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:19.308Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:19.597Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:19.597Z airtap:sauce:internet explorer:10 fetching more results
- waiting: <internet explorer 10 on Windows 2012>
2018-12-17T11:33:21.598Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:21.877Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:21.877Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:23.879Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:24.177Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:24.178Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:26.180Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:26.454Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:26.454Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:28.456Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:28.710Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:28.710Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:30.713Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:30.963Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:30.963Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:32.965Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:33.226Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:33.226Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:35.228Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:37.133Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:37.133Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:39.135Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:39.376Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:39.376Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:41.379Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:41.667Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:41.667Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:43.669Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:43.940Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:43.941Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:45.943Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:46.245Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:46.245Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:48.247Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:48.496Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:48.496Z airtap:sauce:internet explorer:10 fetching more results
2018-12-17T11:33:50.498Z airtap:sauce:internet explorer:10 waiting for test results from http://airtap.local:46878/airtap
2018-12-17T11:33:50.728Z airtap:sauce:internet explorer:10 res.length: 0
2018-12-17T11:33:50.728Z airtap:sauce:internet explorer:10 fetching more results
- waiting: <internet explorer 10 on Windows 2012>

[vweevers]

@ralphtheninja we have to remove IE10, as it's not supported by readable-stream@3