Migrating to shared feathers-service-tests suite

[daffl]

This uses the shared test suite at https://github.com/feathersjs/feathers-service-tests. It looks like two tests are failing. @ekryski or @marshallswain maybe you can have a look?

[daffl]

Specifically $select and $not. I think $select just has the wrong format (it is tested against an array now) and it looks like NeDB doesn't support $not (which is odd because it is in the documentation).

[ekryski]

I can take a look this afternoon most likely. I passed out early last night so I'll be hammering pretty hard on Feathers today. 😴

[daffl]

Ok should be fixed now. I had to update the tests for $not and submit a PR for feathers-knex.

[daffl]

So the tests for $not were actually what $ne is supposed to do. This one should be good to go now except for the updated documentation that I am currently working on.