Convert to TypeScript

[grgur]

Flow seems to have all kind of issues (e.g. memory bloat). Even Facebook migrates from Flow to TypeScript.

Here's a good blog post that describes the transition: https://davidgom.es/porting-30k-lines-of-code-from-flow-to-typescript/

[grgur]

Migrating to JSDoc might be the best option here. People won't have to decide on the system (Flow cs TypeScript) and we'll still provide plenty of information for type safety

https://github.com/Microsoft/TypeScript/wiki/JsDoc-support-in-JavaScript

[ih90]

I'll start to work on this

[grgur]

It's yours @ih90