-r ./base.txt
sphinx==1.5.6
alabaster==0.7.10
releases==1.3.0 # Updated from 1.2.0

-r ./base.txt
sphinx==1.5.6
alabaster==0.7.10
releases==1.3.1 # Updated from 1.2.0

Update releases from 1.3.0 to 1.3.1
Update releases from 1.3.0 to 1.3.1