Add typescript types

[Leiloukou]

I'm always frustrated when I don't have Typescript types. Everyone uses TS, and this library should too.

Could you please add Typescript? It's not even that hard, and it can be done slowly and incrementally.

I believe this is the MOST important thing to do with this library at the moment, and I am willing to help too.

[giorgosart]

Hi @Leiloukou thanks for creating this ticket!

I don't really know how to do that so feel free to create a PR with the changes you need and then I'll follow your lead?

[Leiloukou]

I am not familiar with this library and have never even used it before, but I would be happy to help in the near future. I am currently working on a personal project as well as school, but I will try to help as soon as I can. I will probably be free in December, as I will have less school. See you then!

[Leiloukou]

Update: I'm a little busy, but I still want to help. I might be able to in the near future, sorry 😞