Gulp 4 Docs

Created by: demisx

We currently use gulp 3 for all our build needs. I'd like to come up to speed on gulp 4 and potentially move some of our projects to it. I have a couple of questions:

1. When is the anticipated release for v4?
2. What's the best place to start reading about v4? I am not sure if docs on 4.0 branch are up to date.

Thanks.