Bumped ScalaTest version to 3.0.0-RC2.
Bumped ScalaTest version to 3.0.0-RC2.

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