Error handler usage/setup is mis-documented

[alexisabril]

Steps to reproduce

This issue is not a bug in the software, just a documentation issue. feathers-error is still listed in the README along with the Buzzard version: @feathersjs/errors. In the error handler documentation, the prior .configuration() call is used with the handler. This may be a holdover from Express 3.x as the Feathers configuration will invoke the method producing an error.

A fix would be to change the documentation to:

app.configure(errorHandler({

https://gist.github.com/alexisabril/6f02f3ab5742a5252cfd41ff89be14f9

Sample application using error handler as documented in README: https://gist.github.com/alexisabril/6f02f3ab5742a5252cfd41ff89be14f9

• Tell us what broke. The more detailed the better.
• If you can, please create a simple example that reproduces the issue and link to a gist, jsbin, repo, etc.