TypeScript Definitions

[wwilsman]

We removed convergeOn in favor of the new when and always. When we did this (#11), we also changed the file name from converge-on.js to converge.js.

The types need to be updated to reflect these changes as well. Especially since when and always are publicly available.

Update:

We decided that we're going to hold off on typescript support for now until there are plans for all of BigTest to support it.

[wwilsman]

There now exists a typescript branch with an initial pass at some definitions.

Still unsure if this will be supported directly in all BigTest packages, or if these types should live in a public type repo and maintained by the community.