Set less strict gem version constraints
Set less strict gem version constraints

We don't need to set too strict version constraints here,
newer versions of the development gems are totally ok.

rsalevsky/crowbar,vwallfahrer/crowbar,nkrinner/crowbar,mmnelemane/crowbar,vwallfahrer/crowbar,SUSE-Cloud/crowbar,tserong/crowbar,toabctl/crowbar,MaximilianMeister/crowbar,mmnelemane/crowbar,crowbar/crowbar,aspiers/crowbar,aplanas/crowbar,toabctl/crowbar,tserong/crowbar,dirkmueller/crowbar,crowbar/crowbar,dirkmueller/crowbar,aspiers/crowbar,nkrinner/crowbar,rsalevsky/crowbar,MaximilianMeister/crowbar,SUSE-Cloud/crowbar,aplanas/crowbar