Moose type constraints are expected to return true if the value
passes the constraint, and false otherwise; Moo "constraints", on
the other hand, die if validation fails.

This metaclass allows for Moo-style constraints; it will wrap them
and translate their Moo into a dialect Moose understands.

WWW: https://metacpan.org/release/MooseX-Meta-TypeConstraint-Mooish