[release] Bump VERSION to 2018.05
[release] Bump VERSION to 2018.05

nbrown/rakudo,labster/rakudo,Gnouc/rakudo,tbrowder/rakudo,tbrowder/rakudo,softmoth/rakudo,rakudo/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,Gnouc/rakudo,tbrowder/rakudo,tbrowder/rakudo,Gnouc/rakudo,salortiz/rakudo,labster/rakudo,tony-o/rakudo,softmoth/rakudo,tony-o/rakudo,tony-o/rakudo,nbrown/rakudo,softmoth/rakudo,MasterDuke17/rakudo,rakudo/rakudo,tony-o/rakudo,rakudo/rakudo,softmoth/rakudo,labster/rakudo,nbrown/rakudo,labster/rakudo,nbrown/rakudo,salortiz/rakudo,tbrowder/rakudo,rakudo/rakudo,tbrowder/rakudo,nbrown/rakudo,salortiz/rakudo,labster/rakudo,nbrown/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,rakudo/rakudo,salortiz/rakudo,softmoth/rakudo,tony-o/rakudo,tony-o/rakudo,labster/rakudo,MasterDuke17/rakudo,salortiz/rakudo,salortiz/rakudo,rakudo/rakudo