Fix types

Author: philippjfr

src/widgets.ts

@@ -29,6 +29,10 @@ export type RenderBundle = {
   div: string
 }
 
+export interface Ref {
+  id: string
+}
+
 export interface DocumentChanged {
   event: 'jsevent'
   kind: string
@@ -37,7 +41,7 @@ export interface DocumentChanged {
 export interface ModelChanged extends DocumentChanged {
   event: 'jsevent'
   kind: 'ModelChanged'
-  id: string
+  model: Ref
   new: unknown
   attr: string
 }