Update required type signatures in sjs

Author: noti0na1

compiler/src/dotty/tools/backend/sjs/JSDefinitions.scala

@@ -289,15 +289,15 @@ final class JSDefinitions()(using Context) {
     @threadUnsafe lazy val EnumerationClass = requiredClass("scala.Enumeration")
       @threadUnsafe lazy val Enumeration_Value_NoArg = EnumerationClass.requiredValue(nmeValue)
       @threadUnsafe lazy val Enumeration_Value_IntArg = EnumerationClass.requiredMethod(nmeValue, List(defn.IntType))
-      @threadUnsafe lazy val Enumeration_Value_StringArg = EnumerationClass.requiredMethod(nmeValue, List(defn.StringType))
-      @threadUnsafe lazy val Enumeration_Value_IntStringArg = EnumerationClass.requiredMethod(nmeValue, List(defn.IntType, defn.StringType))
+      @threadUnsafe lazy val Enumeration_Value_StringArg = EnumerationClass.requiredMethod(nmeValue, List(OrNull(defn.StringType)))
+      @threadUnsafe lazy val Enumeration_Value_IntStringArg = EnumerationClass.requiredMethod(nmeValue, List(defn.IntType, OrNull(defn.StringType)))
       @threadUnsafe lazy val Enumeration_nextName = EnumerationClass.requiredMethod(termName("nextName"))
 
     @threadUnsafe lazy val EnumerationValClass = EnumerationClass.requiredClass("Val")
       @threadUnsafe lazy val Enumeration_Val_NoArg = EnumerationValClass.requiredMethod(nme.CONSTRUCTOR, Nil)
       @threadUnsafe lazy val Enumeration_Val_IntArg = EnumerationValClass.requiredMethod(nme.CONSTRUCTOR, List(defn.IntType))
-      @threadUnsafe lazy val Enumeration_Val_StringArg = EnumerationValClass.requiredMethod(nme.CONSTRUCTOR, List(defn.StringType))
-      @threadUnsafe lazy val Enumeration_Val_IntStringArg = EnumerationValClass.requiredMethod(nme.CONSTRUCTOR, List(defn.IntType, defn.StringType))
+      @threadUnsafe lazy val Enumeration_Val_StringArg = EnumerationValClass.requiredMethod(nme.CONSTRUCTOR, List(OrNull(defn.StringType)))
+      @threadUnsafe lazy val Enumeration_Val_IntStringArg = EnumerationValClass.requiredMethod(nme.CONSTRUCTOR, List(defn.IntType, OrNull(defn.StringType)))
 
     def isValueMethod(sym: Symbol)(using Context): Boolean =
       sym.name == nmeValue && sym.owner == EnumerationClass