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

-r ./base.txt
sphinx==1.7.4
alagitpull==0.0.21
releases==1.6.1  # updated from 1.3.1

Update releases from 1.6.0 to 1.6.1
Update releases from 1.6.0 to 1.6.1