> that should just be ticking up a version number.

Ah, but it's rarely just that in many systems. It can only be just that if the component library does exactly what you want. Unfortunately, it happens quite often that component doesn't entirely do what's needed.

People bolt on extra CSS to the components all the time. Two lines of CSS is very tempting if the alternatives are a few hours of work at least. But those two lines need to be verified against every new feature of the component library.

Do those two line fixes a lot, and upgrading becomes A Project.