Publish TypeScript types #1529
Description
Users of TypeScript currently rely on external types provided on our behalf at https://github.com/DefinitelyTyped/DefinitelyTyped. This ticket is to track effort to bring these into our repository and publish them to npm as part of the qunit package.
Ref DefinitelyTyped/DefinitelyTyped#49911.
Ref https://twitter.com/_developit/status/1341237211799367681.