Ah, now that you mention it I recall seeing that. Whoops! Thanks for identifying :)
GitLab seems to be dominating GitHub in terms of features recently. It's unfortunate that so many SaaS integrations only support GitHub or it would make the switch much easier.
I was just lamenting this recently. GitLab's latest features are really nice but the lack of integration with things like Heroku's Pipelines makes switching more costly because I'd have to setup that type of functionality myself. I'm hopeful though that as GitLab gets more popular this will change.