image tileInset property support boolean value.

doric-js/src/widget/image.ts

@@ -120,13 +120,20 @@ export class Image extends View {
         bottom: number
     }
 
+     /**
+     * image tile
+     * 
+     * If boolean value 'true' is passed, it equals { left: 0, top: 0, right: 0, bottom: 0 }
+     * Android: only support all area tile, so you'd better pass boolean value.
+     * iOS: support custom area tile, so you can pass object value and boolean value.
+     */
     @Property
     tileInset?: {
         left: number,
         top: number,
         right: number,
         bottom: number
-    }
+    } | boolean
 
     /**
      * Called if loaded image is animated and played end.