fix certificate selection

app/src/components/Demo/index.tsx

@@ -5,14 +5,14 @@ let heapdump: any
 
 function writeHeapdump(path?: string) {
   if (!heapdump) {
-    heapdump = require('heapdump')
+    //heapdump = require('heapdump')
   }
 
   heapdump.writeSnapshot(path || `${Date.now()}.heapsnapshot`)
   return path
 }
 
-;(window as any).demo = {
+; (window as any).demo = {
   writeHeapdump,
 }