Implement ORS /optimization

[busybox11]

Hi,
I found this package when searching for a TypeScript library to use with OpenRouteService.
It is fairly featured, but doesn't support ORS' optimization endpoint, which is unfortunately the only thing I use.

Unfortunately, I don't have much available time to make a pull request and implement the feature myself, hence this GH Issue - hope that doesn't bother you. Maybe this could get implemented someday :)

Thank you for this awesome lib anyway!
Have a nice day.

[chrstnbwnkl]

Yes this library now only supports end points common to most routers. I don't aim to contribute any other end points right now except for the odd Valhalla one here or there. Welcoming contributions though!