Middleware: support enums in role/permission middleware

[marklawntalk]

No description provided.

[drbyte]

Thanks!
I think we should also test the handle() method of both middleware, as well. Which means also implementing the enum check there.
I've added a potential test (could be refined) as a starting point.

[marklawntalk]

Thanks! I've updated the code to handle the handle method.

[drbyte]

Should also add the tests for the handle method on Roles.

[drbyte]

Thanks