(TK-80) Update dependencies/use webrouting service

This PR does three things. First, it updates all the dependencies in the generated template to the latest versions. Second, it changes the template to use `clj-http-client` instead of `clj-http`. Third, it changes the template to use the webrouting service instead of the webserver service.
For all of our internal projects we want to switch our apps over to our http-client, but I'm not sure if that's necessary for the template.  People are generally going to be familiar with `clj-http` so we might want to leave that in place for the example project.