Allow withRole in RequireAuth to be an array of strings

[ColinFrick]

What is this PR and why do we need it?

Extend RequireAuth to allow multiple roles in the withRole parameter.

I was unable to add a test with the mocked up fetch call, but I added it with a static context provider. Hope that is sufficient.

Pre-Merge Checklist (if applicable)

• [x] Unit and Feature tests have been added/updated for logic changes, or there is a justifiable reason for not doing so.

Closes #50

[Aaron-Ritter]

@mooreds

[mooreds]

Released 0.26 which includes this fix.