Migrate integration tests to Scala 3 (#3926)

Author: Gedochao

build.mill.scala

@@ -994,13 +994,13 @@ trait CliIntegration extends SbtModule with ScalaCliPublishModule with HasTests
     with ScalaCliScalafixModule {
   override def scalaVersion: T[String] = sv
 
-  def sv: String = Scala.scala213
+  def sv: String = Scala.scala3Lts
 
   def tmpDirBase: T[PathRef] = Task(persistent = true) {
     PathRef(Task.dest / "working-dir")
   }
   override def scalacOptions: T[Seq[String]] = Task {
-    super.scalacOptions() ++ Seq("-Xasync", "-deprecation")
+    super.scalacOptions() ++ Seq("-deprecation")
   }
 
   override def ivyDeps: T[Agg[Dep]] = super.ivyDeps() ++ Agg(
@@ -1016,7 +1016,6 @@ trait CliIntegration extends SbtModule with ScalaCliPublishModule with HasTests
       Deps.jsoniterCore,
       Deps.libsodiumjni,
       Deps.pprint,
-      Deps.scalaAsync,
       Deps.slf4jNop,
       Deps.usingDirectives
     )
@@ -1253,7 +1252,7 @@ trait CliIntegration extends SbtModule with ScalaCliPublishModule with HasTests
 }
 
 trait CliIntegrationDocker extends SbtModule with ScalaCliPublishModule with HasTests {
-  override def scalaVersion: T[String] = Scala.scala213
+  override def scalaVersion: T[String] = Scala.scala3Lts
   override def ivyDeps: T[Agg[Dep]]    = super.ivyDeps() ++ Agg(
     Deps.osLib
   )

modules/integration/src/test/scala/scala/cli/integration/BspSuite.scala

@@ -1,9 +1,9 @@
 package scala.cli.integration
 
-import ch.epfl.scala.{bsp4j => b}
+import ch.epfl.scala.bsp4j as b
 import com.eed3si9n.expecty.Expecty.expect
-import com.github.plokhotnyuk.jsoniter_scala.core._
-import com.github.plokhotnyuk.jsoniter_scala.macros._
+import com.github.plokhotnyuk.jsoniter_scala.core.*
+import com.github.plokhotnyuk.jsoniter_scala.macros.*
 import com.google.gson.Gson
 import com.google.gson.internal.LinkedTreeMap
 import org.eclipse.lsp4j.jsonrpc.messages.ResponseError
@@ -14,13 +14,13 @@ import java.util.concurrent.{ExecutorService, ScheduledExecutorService}
 import scala.annotation.tailrec
 import scala.cli.integration.BspSuite.{Details, detailsCodec}
 import scala.concurrent.ExecutionContext.Implicits.global
-import scala.concurrent.duration._
+import scala.concurrent.duration.*
 import scala.concurrent.{Await, Future, Promise}
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 import scala.util.control.NonFatal
 import scala.util.{Failure, Success, Try}
 
-trait BspSuite { _: ScalaCliSuite =>
+trait BspSuite { this: ScalaCliSuite =>
   protected def extraOptions: Seq[String]
   def initParams(root: os.Path): b.InitializeBuildParams =
     new b.InitializeBuildParams(