Fixed an issue where @type could be null.
Literals used in a subject position with predicate rdf:type will not use @type to indicate that value, as that is already used to indicate the datatype of a literal. Instead the full URI, http://www.w3.org/1999/02/22-rdf-syntax-ns#type, will be used.
Full Changelog: v0.1.1...v0.1.2