[js] When the scalar has a Mu type don't type check when putting stuff into it
[js] When the scalar has a Mu type don't type check when putting stuff into it

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