-r ./base.txt
sphinx==1.7.4
alagitpull==0.0.21
releases==1.5.0  # updated from 1.3.1

-r ./base.txt
sphinx==1.7.4
alagitpull==0.0.21
releases==1.6.0  # updated from 1.3.1

Update releases from 1.5.0 to 1.6.0
Update releases from 1.5.0 to 1.6.0