typescript support

[TimonPeng]

Typescript support plz. Thank you!

[cettoana]

Add the help wanted label to see if somebody can help on this,
or I will take a look maybe next week.

[fes300]

Hi @cettoana, I wrote the typings in DefinetelyTyped repository if you want to review https://github.com/DefinitelyTyped/DefinitelyTyped/pull/50513/files

[cettoana]

@fes300 LGTM, many thanks for the help