Hash::Util::FieldHash::Compat is provided by lib/Hash/Util/FieldHash/Compat.pm, not lib/Hash/Util/FieldHash/Compat/Heavy.pm
skip backcompat tests on newer perls, to avoid adding unnecessary prereqs
Hash-Util-FieldHash-Compat-0.07

        - better fix for misleading 'provides' metadata
        - now skipping back-compat tests on newer perls - this test will now
          run for authors only