If the endpoint response is described only by HTTP status without a body, the comparison will fail

[batyshkaLenin]

Are you using jest or chai? jest version 27.0.6 and jest-openapi version 0.14.2

Are you using OpenAPI 2, 3.0.X, or 3.1.0? Version 3.0.0

Describe the bug clearly If the endpoint response is described only by HTTP status without a body, the comparison will fail.

Steps to reproduce the bug:

1. We describe an endpoint, for example, as follows (according to the official documentation, an empty request body should be described in this way):

   /test:
   get:
     summary: Test summary
     responses:
       201:
         description: Test description

2. Our endpoint's response will look like this

   const result = { status:  201 };
   expect(result).toSatisfyApiSpec();

3. The error will look like this

   
   Error: expect(received).toSatisfyApiSpec() // Matches 'received' to a response defined in your API spec, then validates 'received' against it

expected received to satisfy the '201' response defined for endpoint 'GET /test' in your API spec

received did not satisfy it because: response must be null

received contained: { body: {}, text: 'Created' }

The '201' response defined for endpoint 'GET /test' in API spec: { '201': { description: 'Test description' } }

**What did you expect to happen instead?**
I expect the test to verify that there is a description for the HTTP status and the lack of a request body will not return an error. 

**Are you going to resolve the issue?**
I'm not sure if I'm gonna make it