Use RDF::URI instead of RDF::URI.new to avoid automatically turning URIs into hashes during parse.

Author: gkellogg

lib/json/ld/context.rb

@@ -1283,7 +1283,7 @@ def uri(value)
         #log_debug "uri(bnode)#{value}: #{$1}"
         bnode(namer.get_sym($1))
       else
-        value = RDF::URI.new(value)
+        value = RDF::URI(value)
         value.validate! if @options[:validate]
         value.canonicalize! if @options[:canonicalize]
         value = RDF::URI.intern(value) if @options[:intern]