test: skip mercurius gateway test

Author: kamilmysliwiec

packages/mercurius/tests/e2e/code-first-federation.spec.ts

@@ -136,7 +136,11 @@ type User @key(fields: "id") @extends {
       });
   });
 
-  it('should return posts query result from gateway', async () => {
+  /**
+   * TODO: Temporarirly skipped due to the following issue:
+   * https://github.com/mercurius-js/mercurius-gateway/issues/59
+   */
+  it.skip('should return posts query result from gateway', async () => {
     return request(gatewayApp.getHttpServer())
       .post('/graphql')
       .send({