[js] Add some NYI stubs for unicode stuff.
[js] Add some NYI stubs for unicode stuff.

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