Fix deprecated import

Author: mdedetrich

build.sbt

@@ -11,7 +11,7 @@ import ValidatePullRequest._
 import net.bzzt.reproduciblebuilds.ReproducibleBuildsPlugin.reproducibleBuildsCheckResolver
 import com.github.pjfanning.pekkobuild._
 import Dependencies.{ h2specExe, h2specName }
-import com.typesafe.sbt.SbtMultiJvm.MultiJvmKeys.MultiJvm
+import com.typesafe.sbt.MultiJvmPlugin.autoImport._
 import java.nio.file.Files
 import java.nio.file.attribute.{ PosixFileAttributeView, PosixFilePermission }