Merge pull request #77 from hackersandslackers/renovate/pytz-2021.x

Update dependency pytz to v2021

Author: toddbirchard

requirements.txt

@@ -16,7 +16,7 @@ protobuf==3.13.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycparser==2.20
-pytz==2020.5
+pytz==2021.1
 requests==2.25.1
 rsa==4.7
 six==1.15.0