Build JS distributables using local javascript

[Archmonger]

Description

It was kind of annoying that our Python wheels didn't utilize the latest JavaScript contained within this repo, requiring a "chain of NPM releases" prior to being able to do a Python release.

This change allows us to utilize local JavaScript for builds, rather than relying on NPM releases.

Checklist

Please update this checklist as you complete each item:

• Tests have been developed for bug fixes or new functionality.
• The changelog has been updated, if necessary.
• Documentation has been updated, if necessary.
• GitHub Issues closed by this PR have been linked.

_{By submitting this pull request I agree that all contributions comply with this project's open source license(s).}