`headers` are not matched strictly

[posva]

Hello I noticed that when using toHaveFetched(url, { headers: {} }), it will always pass no matter what headers are passed but it should pass only if no headers are passed

    fetchMock.get('/api', { body: {} })
// custom wrapper around fetch
    await api.get('2')
    expect(fetchMock).toHaveFetched('/api/2', {
      headers: {
        // no Accept
        Accept: 'application/json'
        // 'Content-Type': 'application/json',
      },
    })