Merge pull request #9 from code0-tech/fix-no-op-tag-stack

Add missing tags method for NoOpTagStack

Author: Taucher2003

lib/code0/zero_track/logs/json_formatter.rb

@@ -43,6 +43,10 @@ def clear; end
           def format_message(message)
             message
           end
+
+          def tags
+            []
+          end
         end
 
         class Tagged < JsonFormatter