Fix failing spec tests due to arrayify-stream update

Author: rubensworks

spec/parser.js

@@ -2,6 +2,6 @@ const RdfXmlParser = require("..").RdfXmlParser;
 
 module.exports = {
   parse: function (data, baseIRI) {
-    return require('arrayify-stream').default(require('streamify-string')(data).pipe(new RdfXmlParser({ baseIRI })));
+    return require('arrayify-stream').arrayifyStream(require('streamify-string')(data).pipe(new RdfXmlParser({ baseIRI })));
   },
 };