Log Message:
py-httplib2: updated to 0.20.1

0.20.1

No changes from 0.20.0, re-upload of broken py2 wheel.

0.20.0

IMPORTANT cacerts: remove expired DST Root CA X3, add ISRG Root X1, X2
https://github.com/httplib2/httplib2/pull/200
https://github.com/httplib2/httplib2/issues/203

tls: accept min/max ssl.TLSVersion enum values
https://github.com/httplib2/httplib2/pull/191

setup(python_requires=...) may need setuptools update
https://github.com/httplib2/httplib2/pull/195