workaround es6-transpiler and 6to5 bugs
workaround es6-transpiler and 6to5 bugs

Rich-Harris/ractive,Rich-Harris/ractive,marcalexiei/ractive,ISNIT0/ractive,heavyk/ractive,pingjiang/ractive,ndimas/ractive,Rich-Harris/ractive,dyx/ractive,ISNIT0/ractive,magicdawn/ractive,heavyk/ractive,cgvarela/ractive,heavyk/ractive,dyx/ractive,ractivejs/ractive,pingjiang/ractive,JonDum/ractive,cgvarela/ractive,ndimas/ractive,aliprogrammer69/ractive,ractivejs/ractive,cgvarela/ractive,thomsbg/ractive,ISNIT0/ractive,squaredup/ractive,JonDum/ractive,ndimas/ractive,thomsbg/ractive,aliprogrammer69/ractive,magicdawn/ractive,squaredup/ractive,ractivejs/ractive,marcalexiei/ractive,pingjiang/ractive,JonDum/ractive,aliprogrammer69/ractive,magicdawn/ractive,thomsbg/ractive,marcalexiei/ractive,squaredup/ractive,dyx/ractive