[Dbix-class] Missing dependency

[Ben Tilly]

I discovered the hard way that if you have Moose installed but have
not installed MooseX::Types then DBIx::Class will fail test
t/55namespaces_cleaned.t because
DBIx::Class::Storage::DBI::Replicated::Replicant has stuff left in its
namespace when it crashes before it can use namespace::clean.

I fixed it on my end by simply installing the dependency.  But the
problem should get an upstream fix.