permit multiple permissions in restrictWithPermissions()

[paul45]

see #476

[MGatner]

Please add a test case for the new code. This library needs its workflows updated before Actions will pass.

[paul45]

actualy there are no tests for the AuthTrait.php

[MGatner]

I would still like to see a test added; unfortunate that there are no AuthTrait tests but adding one for your code would be a good start. I actually find traits to be easier to test since you can use them on the test case itself then have direct access to all methods.

This will not make it in before #517 so will need rebasing.