Oh, cool. I think I was confused about Apple's rules on this. I guess you are allowed to push minor updates to your app, as long as it's JavaScript being executed by their JavaScript engine/WebKit.

But apparently there is (or at one point was) a restriction that says you're not supposed to add new features via remote executable code pushes [0] (although I'm not sure if they'd notice).

[0] https://rollout.io/blog/updating-apps-without-app-store/