Skip the new unicode tests on narrow builds which don't know about surrogates.
Skip the new unicode tests on narrow builds which don't know about surrogates.

eodolphi/jsonschema,varunarya10/jsonschema,python-jsonschema/jsonschema,sightmachine/jsonschema,Julian/jsonschema,mathewmarcus/jsonschema,Julian/jsonschema,eodolphi/jsonschema,dnephin/jsonschema,jamesmarva/jsonschema