Update build dependencies for beanbag-frontend-buildkit.
Review Request #14666 — Created Nov. 3, 2025 and updated — Latest diff uploaded
This change updates the buildkit metapackage to use the latest babel,
rollup, and less versions. It also swaps out uglifyjs for terser.I've updated the README to not list explicit versions because it's the
sort of thing that easily gets out of date.
Used this from other packages.