Use new R:I.UniqueRepeatedWith
Use new R:I.UniqueRepeatedWith

- no noticeable change for .unique(:with)
- .repeated(:with) about 4x faster

tony-o/rakudo,MasterDuke17/rakudo,rakudo/rakudo,raydiak/rakudo,tbrowder/rakudo,usev6/rakudo,salortiz/rakudo,Gnouc/rakudo,Gnouc/rakudo,salortiz/rakudo,sjn/rakudo,salortiz/rakudo,MasterDuke17/rakudo,sjn/rakudo,Gnouc/rakudo,salortiz/rakudo,tbrowder/rakudo,nbrown/rakudo,MasterDuke17/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,MasterDuke17/rakudo,salortiz/rakudo,lucasbuchala/rakudo,lucasbuchala/rakudo,tbrowder/rakudo,nbrown/rakudo,labster/rakudo,lucasbuchala/rakudo,tbrowder/rakudo,lucasbuchala/rakudo,Gnouc/rakudo,jonathanstowe/rakudo,tony-o/rakudo,nbrown/rakudo,jonathanstowe/rakudo,tony-o/rakudo,usev6/rakudo,tbrowder/rakudo,tony-o/rakudo,nbrown/rakudo,labster/rakudo,raydiak/rakudo,rakudo/rakudo,rakudo/rakudo,tony-o/rakudo,awwaiid/rakudo,rakudo/rakudo,awwaiid/rakudo,softmoth/rakudo,labster/rakudo,tony-o/rakudo,MasterDuke17/rakudo,usev6/rakudo,awwaiid/rakudo,softmoth/rakudo,labster/rakudo,raydiak/rakudo,softmoth/rakudo,softmoth/rakudo,usev6/rakudo,salortiz/rakudo,labster/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,Gnouc/rakudo,sjn/rakudo,sjn/rakudo,nbrown/rakudo,rakudo/rakudo,raydiak/rakudo,nbrown/rakudo,awwaiid/rakudo,sjn/rakudo,labster/rakudo,softmoth/rakudo,tbrowder/rakudo,usev6/rakudo,lucasbuchala/rakudo,rakudo/rakudo