switch to typescript

[Almenon]

I recently converted python-shell to typescript, Also see my medium article. (cause every two-bit dev has to have a medium article now right? :P )

Eventually I want to implement #17 perserving open/close of nodes, but before I do that I would want to convert to typescript.

Not sure when I'll get around to this. After October or later probably.

[Almenon]

In progress - I have a halfway complete conversion. see https://github.com/Almenon/renderjson