Fix dir() on all backends
Fix dir() on all backends

- :test now works as intended
- :absolute parameter (new spec) also works
- :CWD parameter doesn't work correctly yet on all backend (todo)

I hope future backends will just work as moar  :-)

Leont/rakudo,awwaiid/rakudo,sergot/rakudo,tony-o/rakudo,tbrowder/rakudo,samcv/rakudo,ab5tract/rakudo,teodozjan/rakudo,samcv/rakudo,awwaiid/rakudo,lucasbuchala/rakudo,MasterDuke17/rakudo,jonathanstowe/rakudo,retupmoca/rakudo,awwaiid/rakudo,softmoth/rakudo,softmoth/rakudo,b2gills/rakudo,ungrim97/rakudo,cognominal/rakudo,tony-o/deb-rakudodaily,labster/rakudo,paultcochrane/rakudo,skids/rakudo,niner/rakudo,paultcochrane/rakudo,ungrim97/rakudo,cognominal/rakudo,usev6/rakudo,nbrown/rakudo,nbrown/rakudo,LLFourn/rakudo,LLFourn/rakudo,tbrowder/rakudo,ugexe/rakudo,softmoth/rakudo,Gnouc/rakudo,teodozjan/rakudo,raydiak/rakudo,b2gills/rakudo,nbrown/rakudo,zhuomingliang/rakudo,tony-o/rakudo,ab5tract/rakudo,retupmoca/rakudo,teodozjan/rakudo,ungrim97/rakudo,zostay/rakudo,softmoth/rakudo,paultcochrane/rakudo,b2gills/rakudo,salortiz/rakudo,nunorc/rakudo,jonathanstowe/rakudo,nunorc/rakudo,salortiz/rakudo,tony-o/rakudo,Leont/rakudo,MasterDuke17/rakudo,rakudo/rakudo,sjn/rakudo,MasterDuke17/rakudo,Gnouc/rakudo,cognominal/rakudo,labster/rakudo,tony-o/deb-rakudodaily,ab5tract/rakudo,dankogai/rakudo,lucasbuchala/rakudo,MasterDuke17/rakudo,labster/rakudo,samcv/rakudo,awwaiid/rakudo,niner/rakudo,cygx/rakudo,Gnouc/rakudo,samcv/rakudo,samcv/rakudo,Gnouc/rakudo,b2gills/rakudo,raydiak/rakudo,ugexe/rakudo,tony-o/rakudo,zhuomingliang/rakudo,azawawi/rakudo,jonathanstowe/rakudo,azawawi/rakudo,ugexe/rakudo,lucasbuchala/rakudo,sergot/rakudo,awwaiid/rakudo,cygx/rakudo,LLFourn/rakudo,labster/rakudo,sjn/rakudo,azawawi/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,nbrown/rakudo,retupmoca/rakudo,skids/rakudo,skids/rakudo,zhuomingliang/rakudo,tbrowder/rakudo,salortiz/rakudo,Leont/rakudo,sjn/rakudo,tony-o/deb-rakudodaily,sergot/rakudo,laben/rakudo,ugexe/rakudo,tony-o/rakudo,usev6/rakudo,paultcochrane/rakudo,rakudo/rakudo,ugexe/rakudo,tony-o/deb-rakudodaily,tony-o/deb-rakudodaily,salortiz/rakudo,nbrown/rakudo,LLFourn/rakudo,dankogai/rakudo,MasterDuke17/rakudo,zostay/rakudo,Gnouc/rakudo,niner/rakudo,skids/rakudo,azawawi/rakudo,Leont/rakudo,labster/rakudo,dankogai/rakudo,usev6/rakudo,tbrowder/rakudo,raydiak/rakudo,niner/rakudo,cygx/rakudo,raydiak/rakudo,tbrowder/rakudo,tony-o/rakudo,teodozjan/rakudo,ab5tract/rakudo,rakudo/rakudo,retupmoca/rakudo,rakudo/rakudo,cygx/rakudo,zostay/rakudo,salortiz/rakudo,salortiz/rakudo,sjn/rakudo,rakudo/rakudo,skids/rakudo,lucasbuchala/rakudo,ungrim97/rakudo,tbrowder/rakudo,ungrim97/rakudo,rakudo/rakudo,usev6/rakudo,laben/rakudo,laben/rakudo,usev6/rakudo,paultcochrane/rakudo,nbrown/rakudo,sjn/rakudo,zhuomingliang/rakudo,labster/rakudo,nunorc/rakudo,tony-o/deb-rakudodaily,nunorc/rakudo,laben/rakudo,cygx/rakudo,dankogai/rakudo,azawawi/rakudo,lucasbuchala/rakudo,cognominal/rakudo,zostay/rakudo,Gnouc/rakudo,sergot/rakudo,LLFourn/rakudo,MasterDuke17/rakudo,tony-o/deb-rakudodaily,softmoth/rakudo,b2gills/rakudo,ab5tract/rakudo,dankogai/rakudo,cognominal/rakudo