fix a few sbt warnings while we're at it
fix a few sbt warnings while we're at it

chandu0101/scalajs-react-components,aparo/scalajs-react-components,oyvindberg/scalajs-react-components,aparo/scalajs-react-components,tpdi/scalajs-react-components,rleibman/scalajs-react-components,oyvindberg/scalajs-react-components,tpdi/scalajs-react-components,elacin/scalajs-react-components,oyvindberg/scalajs-react-components,chandu0101/scalajs-react-components,elacin/scalajs-react-components,tpdi/scalajs-react-components,elacin/scalajs-react-components