Added regression tests for KT-2474 Range lacks reverse() in JavaScript backend

#KT-2474 Fixed

js/js.tests/test/org/jetbrains/k2js/test/semantics/RangeTest.java

@@ -57,4 +57,8 @@ public final class RangeTest extends SingleFileTranslationTest {
     public void testIntDownTo() throws Exception {
         checkFooBoxIsOk();
     }
+
+    public void testReverse() throws Exception {
+        checkFooBoxIsOk();
+    }
 }

js/js.translator/testData/range/cases/reverse.kt

@@ -0,0 +1,8 @@
+package foo
+
+fun box(): String {
+    assertEquals(listOf(7, 6, 5, 4, 3), (3..7).reverse())
+    assertEquals(listOf(10, 11, 12, 13), (13 downTo 10).reverse())
+
+    return "OK"
+}