Implement Parameter.constraints; fix NPMCA in Parameter.named_names.
Implement Parameter.constraints; fix NPMCA in Parameter.named_names.

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