py36-urllib3 and py-certbot

[Weldon Godfrey]

Due to a security advisory, I port upgraded py-36-urllib3 to 1.25.6 

Since then, 

py36-certbot-0.39.0,1 

is unhappy for the version of urllib3 being too new: 

pkg_resources.DistributionNotFound: The 'urllib3<1.25,>=1.21.1'
distribution was not found and is required by request