DRT-4342 add mfglabs resolver from akka-stream-extensions
DRT-4342 add mfglabs resolver from akka-stream-extensions

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