Function onUpgrade

github-actions/browserstack/set-browserstack-env.js:291–295

(res, socket, head)

          res.upgrade = true;
        }
        function onUpgrade(res, socket, head) {
          process.nextTick(function() {
            onConnect(res, socket, head);
          });
        }
        function onConnect(res, socket, head) {
          connectReq.removeAllListeners();
          socket.removeAllListeners();