Typescript definitions

[karpour]

Thanks for this great lib, I stumbled upon it after getting annoyed by all log entries having different PIDs using my previous method, which was piping the log message into logger --journald.
It would be great if you could add Typescript definitions to the package, for cleaner code in Typescript projects!

[jue89]

Are you experienced with Typescript? Maybe we can work together on TypeScript definitions. Or if you want to, you can open a pull request.

[jue89]

Maybe that's still relevant to you. #27 is about to introduce definitions. Would you mind to have a look, too?