Test for Perl::Critic violations using Test2. Although this testing tool
uses the Test2 API instead of the older Test::Builder API, the primary
motivation is to provide output in a more useful form. That is policy
violations are grouped by policy class, and the policy class name is
clearly displayed as a diagnostic. The author finds the former more useful
because he tends to address one type of violation at a time. The author
finds the latter more useful because he tends to want to lookup or adjust
the configuration of the policy as he is addressing violations.
