add support for updating user bio
add support for updating user bio

https://app.asana.com/0/23380282435977/19937670493647

this also has a simple example of returning 500 if there’s any error
during the save attempt. we should figure out how to integrate this
with Rollbar (maybe in the implementation of res.serverError)

Connoropolous/hylo-node,Hylozoic/hylo-node,Connoropolous/hylo-node,Connoropolous/hylo-node,Hylozoic/hylo-node