See [Invidious-Instances](https://github.com/omarroth/invidious/wiki/Invidious-Instances) for the reference.
Travis now recommends removing `sudo: false` from configuration: https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration.
This reverts commit cc6a960e13.
cc6a960e13
[ci skip]