added os.Root bindings to the JSVM

plugins/jsvm/binds.go

@@ -770,6 +770,8 @@ func osBinds(vm *goja.Runtime) {
 	obj.Set("rename", os.Rename)
 	obj.Set("remove", os.Remove)
 	obj.Set("removeAll", os.RemoveAll)
+	obj.Set("openRoot", os.OpenRoot)
+	obj.Set("openInRoot", os.OpenInRoot)
 }
 
 func formsBinds(vm *goja.Runtime) {

plugins/jsvm/binds_test.go

@@ -1782,5 +1782,5 @@ func TestOsBindsCount(t *testing.T) {
 	vm := goja.New()
 	osBinds(vm)
 
-	testBindsCount(vm, "$os", 18, t)
+	testBindsCount(vm, "$os", 20, t)
 }