Summary: Use Test::Mojo roles cleanly and safely

Description:
'Test::Mojo::Role' is not a real module, just documentation. Roles do not
inherit from a base, but if they did, this would be the base class for
'Test::Mojo::Role::'s.

Roles should be built in such a way that they can be applied via the
Role::Tiny manpage. Roles may actually be applied using the
Test::Mojo::WithRoles manpage which provides a nice interface to the test
author. Your role does not need to depend on the Test::Mojo::WithRoles
manpage but if it does, the test author will get that module during
install.

Maintainer: nobody