NeoJSON WriteStream extension changes 
          Reason for change
          NeoJSON was adding the extension method #<< to WriteStream. This protocol is not very common in VA Smalltalk and we prefer to use other messages  more polymorphic with other streams. 
          Action required
          Change senders of WriteStream >> #<< to use #nextPutAll: and #print: 
           
         
        
          Last modified date: 11/06/2019