`disabled` class is not needed for wrapper.

I was getting port in use errors.

Newer bundlesize versions still don't work with node.js 10.x.

babel has some bugs that we need to be fixed.

Add additional wording to the Introduction section of Bootstrap docs about the bootstrap bundle js (#26688)

saves a redirect

This was broken after the docs refactoring.

Link to the more user-friendly Node download page (rather than just the raw directory view)

Add an sr-only class to the label on inline labels with a custom select

Downgrade bundlesize until they make brotli optional since it doesn't work with node.js 10.x yet.

So, babel, qunit/karma-qunit and bundle-size aren't the latest versions.

Among other things, closes https://github.com/twbs/bootstrap/issues/26548

By applying the transition: CSS property only to classes that are
active during sliding, we avoid an unnecessary, non-zero-time
animation that although mostly invisible, does interfere with e.g.
z-index based parallax