Update Typings

This project uses typescript, and has a bunch of [type declarations](https://github.com/intuit/design-systems-cli/tree/master/typings) for projects that did not include types. It would be nice to see if these packages have official types now, or if we can contribute some of these types back to DefinitelyTyped.

We don't need a single PR to remove all of them, feel free to just make a PR if you're able to update a package. This is a great issue if you want to learn more about typescript and DefinitelyTyped!