Release 0.6.1

A constant has been added for common non-exhaustive-match warning pattern, you can now use:

    import com.softwaremill.clippy.ClippySbtPlugin.WarningPatterns._
    // ...
    settings(
      clippyFatalWarnings ++= List(
        NonExhaustiveMatch,
        ".*\\[wartremover:.*\\].*[\\s\\S]*"
      )
    )