• (Addition) Add attribute in AbbreviatingSerializer to omit base
  declaration to have all relative URIs (#135 from @kjetilk).
  
• (Update) Added ground_blanks attribute to Attean::SimpleQueryEvaluator.
  
• (Update) Fixed bug in AtteanX::API::Lexer that caused infinite recursion
  when finding EOF in the middle of an escape sequence.
  
• (Update) Updates to use namespace types, available in Types::Attean
  (#129, #137 from @kjetilk).