Migrating library to typescript

[Ilham-Habibullin]

Even if it will not be srtictly typed that would be good since other developers fulfilled with enthusiasm will be able to do PRs with type covering. Maybe you already have some plans on that?

[whitlockjc]

It's possible but I like JavaScript. My compromise (for now) is providing the TypeScript type definitions with the sources so that if you use TypeScript in a dependent project, you can still get static typing as you want.