default -> companion: replace all mentions of default and default object

js/js.translator/testData/examples/sortedTests/unsupported/classObject.kt

@@ -1,5 +1,5 @@
 class C() {
-    default object {
+    companion object {
         fun create() = C()
     }
 }

js/js.translator/testData/examples/sortedTests/unsupported/classObjectInterface.kt

@@ -1,7 +1,7 @@
 class C() {
     fun getInstance(): Runnable = C
 
-    default object: Runnable {
+    companion object: Runnable {
         override fun run(): Unit {
         }
     }

js/js.translator/testData/examples/sortedTests/unsupported/classObjectMethod.kt

@@ -3,11 +3,11 @@ abstract open class Default {
 }
 
 class MyInt() {
-    default object : Default {
+    companion object : Default {
         override fun defaultValue(): Int = 610
     }
 }
 
-fun toDefault<T : Any>(t: T) where default object T : Default = T.defaultValue()
+fun toDefault<T : Any>(t: T) where class object T : Default = T.defaultValue()
 
 fun box(): String = if (toDefault<MyInt>(MyInt()) == 610) "OK" else "fail"