Merge pull request #37 from Ch00k/patch-1

Add taskName to BUILTIN_ATTRS set

Author: marselester

json_log_formatter/__init__.py

@@ -25,6 +25,7 @@
     'processName',
     'relativeCreated',
     'stack_info',
+    'taskName',
     'thread',
     'threadName',
 }