remove Request and move to ESM

[jimmywarting]

This is a bit of a total breaking change...

This remove the very old legacy request module and replaces it with fetch.
So all the callback style is therefore also removed.

I didn't want to bring any hard dependency on any other node-fetch or similar library b/c NodeJS now ships with it built in.

So i made it optional to just let the developer bring in any http library they may want to use... it's a bit ashamed that so many different libraries uses different http libraries and can't agree upon one single http library. in our project we ended up with some of our dependencies using request/axios/got/node-fetch... o total dependency hell.

Right now everybody should just use fetch as that is avalible everywhere, Deno, Bun.js, NodeJS, browsers and Service Worker. it's the universal http library that exist everywhere now.

[jimmywarting]

maybe just wish to have a look at it over at: https://github.com/jimmywarting/routific-node-client/tree/esm#usage