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.