Issue 2043: add test for "is" typeExtension custom element support
Issue 2043: add test for "is" typeExtension custom element support

cgvarela/ractive,marcalexiei/ractive,pingjiang/ractive,magicdawn/ractive,pingjiang/ractive,ractivejs/ractive,ndimas/ractive,cgvarela/ractive,ndimas/ractive,JonDum/ractive,thomsbg/ractive,ISNIT0/ractive,thomsbg/ractive,ISNIT0/ractive,squaredup/ractive,ndimas/ractive,thomsbg/ractive,ractivejs/ractive,cgvarela/ractive,squaredup/ractive,pingjiang/ractive,marcalexiei/ractive,marcalexiei/ractive,magicdawn/ractive,JonDum/ractive,ISNIT0/ractive,ractivejs/ractive,JonDum/ractive,magicdawn/ractive,squaredup/ractive