Tiny tiny release, just to fix the website incorrectly not listing Javascript
in the list of languages you could choose for a custom build. NPM and CDN
build should not have been affected so 10.3.1 is effectively the same as
10.3.2 for those builds.
If you made a custom build from the website with 10.3 or 10.3.1 you may
want to check and make sure it includes Javascript, and if not, build it again.