No typescript support

[mikebski]

Any plans to add typescript support?

[chadly]

https://twitter.com/cassidoo/status/1255690494077628418

I'm in the "never, never" stage of typescript right now.

[chadly]

I'm very much a typescript believer now. If someone wants to use ChatGPT to convert this all to TS, I'd be happy to review the PR.