Upgrade feathers #19

I would like to get feathersjs upgraded, however there are some issues with external libraries--

@feathersjs/socketio - depends on engine.io which depends on deprecated uws. Once engine.io switches away from uws, we should be good to upgrade.

@feathersjs/primus is appealing as an alternative to the above, however webpack is not supported for @feathersjs/primus-client. If they support webpack at some point, this would be worth switching to.