fix(web-server): since node 12 there is no util.puts

see https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md
and nodejs/node#25377

testapp/scripts/web-server.js

@@ -27,7 +27,7 @@ var main = function() {
   testApp.use(bodyParser.json());
   testApp.use(testMiddleware);
   testApp.listen(port);
-  util.puts(["Starting express web server in", testAppDir ,"on port", port].
+  console.log(["Starting express web server in", testAppDir ,"on port", port].
       join(" "));
 };