bump ruby from 2.3.0 to 2.3.1
bump ruby from 2.3.0 to 2.3.1

I tested that on a few modules, 2.3.1 is available. though setting only
2.3 still doesn't work :sadface:

voxpupuli/modulesync_config,voxpupuli/modulesync_config,dhoppe/modulesync_config,puppet-community/modulesync_config,voxpupuli/modulesync_config,dhoppe/modulesync_config,dhoppe/modulesync_config,voxpupuli/modulesync_config,dhoppe/modulesync_config