Deprecate miragejs re-exports from ember-cli-mirage module

[SergeAstapov]

@cah-briangantzler this is the dirty but seem to be working solution for re-exports deprecation.

[cah-brian-gantzler]

This works wonderfully. I googled for some time and was not able to find a way. Might want to write a blog post on this.

[cah-brian-gantzler]

The docs say to import like this

import { Factory } from 'ember-cli-mirage';

Does anyone import like this?

import Factory from 'ember-cli-mirage/factory';

because this file supports that. https://github.com/miragejs/ember-cli-mirage/blob/master/addon/factory.js

There are a few others. May have to deprecate that as well.

[SergeAstapov]

@cah-briangantzler lot me take another look, will try to catch all the re-exports as they have to be deprecated

[cah-brian-gantzler]

Ironically ember-cli-mirage still imported the re-exports in its tests instead of mirage proper. Updated those if you want to take a look.

#2246