Update app.js

@@ -103,7 +103,7 @@ async function handleEvent(event) {
         body: event.message.image
       };
 
-    }).then(
+    }).then((options)=>{
       request.post(options, function (error, response, body) {
         var data=JSON.stringify(body);  
         var text='';
@@ -139,7 +139,8 @@ async function handleEvent(event) {
             }
             client.replyMessage(event.replyToken,result).then(resolve).catch(reject);
           });
-      }))
+      })
+    })
   }
   else if(event.type == 'message' && event.message.type == 'text')
   {