Make Supply.squish a multi
Make Supply.squish a multi

With some optimizations, specifically for the default &with

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