This was causing a lot of headache on the frontend. Now, there a single
source of truth. If you query `currentUser` you can overwrite your local
copy of the user and update the UI.
@mattwr18 and I could not find any other way how to prevent leftover
processes than using a complex list of npm scripts.
Watch: http://youtu.be/byovuFwNXiw
and see how we despearately try to fix this stupid problem.
This keeps our tests small. It is quite a headache though, because of an
issue with jest and with transpiling. For reasons that I don't understand
running `yarn run test:jest` sometimes complains about open handles.
I would love to hear how to make our build more reliable.
