Move junit dependency back to the Test scope

Author: lolgab

build.sbt

@@ -167,7 +167,7 @@ lazy val xml = crossProject(JSPlatform, JVMPlatform, NativePlatform)
     scalaModuleMimaPreviousVersion := None, // No such release yet
     // Scala Native cannot run forked tests
     Test / fork := false,
-    libraryDependencies += "org.scala-native" %%% "junit-runtime" % nativeVersion,
-    addCompilerPlugin("org.scala-native" % "junit-plugin" % nativeVersion cross CrossVersion.full),
+    Test / libraryDependencies += "org.scala-native" %%% "junit-runtime" % nativeVersion,
+    addCompilerPlugin("org.scala-native" % "junit-plugin" % nativeVersion % Test cross CrossVersion.full),
     Test / testOptions += Tests.Argument(TestFrameworks.JUnit, "-a", "-s", "-v")
   )