Handle datetime.utcnow deprecation

Author: mavwolverine

json_logging/util.py

@@ -3,7 +3,7 @@
 import os
 import re
 import sys
-from datetime import datetime
+from datetime import datetime, timezone
 from logging import Logger, StreamHandler
 
 import json_logging
@@ -71,7 +71,7 @@ def validate_subclass(subclass, superclass):
     return True
 
 
-_epoch = datetime(1970, 1, 1)
+_epoch = datetime(1970, 1, 1, tzinfo=timezone.utc)
 
 
 def epoch_nano_second(datetime_):

tests-performance/benmark_micro.py

@@ -1,9 +1,9 @@
 # coding=utf-8
 import time
 import timeit
-from datetime import datetime
+from datetime import datetime, timezone
 
-utcnow = datetime.utcnow()
+utcnow = datetime.now(timezone.utc)
 
 numbers = 1000000
 # timeit_timeit = timeit.timeit(lambda: '%04d-%02d-%02dT%02d:%02d:%02dZ' % (