Get rid of deprecated annotations and modifiers in stdlib (besides JS)

libraries/examples/js-example/src/test/kotlin/sample/SampleTest.kt

@@ -5,7 +5,8 @@ import sample.Hello
 import org.junit.Test
 
 class SampleTest {
-    Test fun dummy(): Unit {
+    @Test
+    fun dummy(): Unit {
         Hello().doSomething()
     }
 }