update viewer

iframe/web/viewer.html

@@ -155,7 +155,7 @@ See https://github.com/adobe-type-tools/cmap-resources
 				reset();
 			});
 		}
-
+        enablePinchZoom();
   /*      if(!isWeixin){
 			document.addEventListener('webviewerloaded', () => {
 				console.log('webviewerloaded');