drt-4324 add jsdom to package.json
drt-4324 add jsdom to package.json

somanythings/drt-scalajs-spa-exploration,UKHomeOffice/drt-scalajs-spa-exploration,somanythings/drt-scalajs-spa-exploration,UKHomeOffice/drt-scalajs-spa-exploration,UKHomeOffice/drt-scalajs-spa-exploration,somanythings/drt-scalajs-spa-exploration,somanythings/drt-scalajs-spa-exploration