Bumped up sbt version to 1.3.13.
Bumped up sbt version to 1.3.13.

dotty-staging/scalatest,scalatest/scalatest,dotty-staging/scalatest,dotty-staging/scalatest,cheeseng/scalatest,cheeseng/scalatest,cheeseng/scalatest,scalatest/scalatest,scalatest/scalatest