We've had to periodically update the engines section of our package.json files each time a new version of Node is released. Sometimes, this breaks Travis builds. And at other times, it breaks tools like amphtml-validator.

See #25161 (comment) for a discussion on this.

I propose that we configure Renovate to keep the engines section in all our package.json files up to date. Here are the docs: https://docs.renovatebot.com/node. I think a support policy of active should give us what we're looking for.