message: expose hub's middleware hooks to parent app
  ember-cli does not treat these as recursive by default
diff: @@ -2,5 +2,13 @@ module.exports = {
  name: '@cardstack/test-support',
  isDevelopingAddon() {
  return process.env.CARDSTACK_DEV;
  + },
  + serverMiddleware({ app }) {
  + let hub = this.addons.find(a => a.name === '@cardstack/hub');
  + return hub.serverMiddleware({ app });
  + },
  + testemMiddleware(app) {
  + let hub = this.addons.find(a => a.name === '@cardstack/hub');
  + return hub.testemMiddleware(app);
  }
  };
  