Ensure only expected Scala versions are used with sbt
Latest version
[![sbt-strict-scala-versions Scala version support](https://index.scala-lang.org/raboof/sbt-strict-scala-versions/sbt-strict-scala-versions/latest.svg)](https://index.scala-lang.org/raboof/sbt-strict-scala-versions/sbt-strict-scala-versions)
sbt 1.x badge
[![sbt-strict-scala-versions Scala version support](https://index.scala-lang.org/raboof/sbt-strict-scala-versions/sbt-strict-scala-versions/latest-by-scala-version.svg?platform=sbt1.0)](https://index.scala-lang.org/raboof/sbt-strict-scala-versions/sbt-strict-scala-versions)