Update specs2 version

Author: felixmulder

project/Build.scala

@@ -725,7 +725,8 @@ object Build {
     libraryDependencies ++= Seq(
       "com.typesafe.sbt" % "sbt-interface" % sbtVersion.value,
       "org.scala-sbt" % "api" % sbtVersion.value % "test",
-      ("org.specs2" %% "specs2" % "2.3.11" % "test").withDottyCompat()
+      ("org.specs2" %% "specs2-core" % "3.9.1" % "test").withDottyCompat(),
+      ("org.specs2" %% "specs2-junit" % "3.9.1" % "test").withDottyCompat()
     ),
     // The sources should be published with crossPaths := false since they
     // need to be compiled by the project using the bridge.

sbt-bridge/test/xsbt/ExtractAPISpecification.scala

@@ -3,7 +3,7 @@ package xsbt
 
 import org.junit.runner.RunWith
 import xsbti.api._
-import xsbt.api.DefaultShowAPI
+import dotty.tools.dotc.sbt.DefaultShowAPI
 import org.specs2.mutable.Specification
 import org.specs2.runner.JUnitRunner
 

sbt-bridge/test/xsbt/ScalaCompilerForUnitTesting.scala

@@ -3,8 +3,6 @@ package xsbt
 
 import xsbti.compile.SingleOutput
 import java.io.File
-import _root_.scala.tools.nsc.reporters.ConsoleReporter
-import _root_.scala.tools.nsc.Settings
 import xsbti._
 import xsbti.api.SourceAPI
 import sbt.IO._