Lint files first in your IDE before minifying. Syntax errors can break the site after minify. Some browsers are able to deal with certain errors in unminified code and the site will work, but due to the way minification works, it will break.
I didn’t check what the changes were, I just thought it might be a good idea to update the used libraries, as I was already changing code.
Sorry for the late response, I was on vacation for the last two weeks.
I haven’t checked out Kirby 3 yet, but if the required changes aren’t a major hassle, I’ll certainly update KRB.
I’ll add it to my ToDo list. Thanks for the interest!