feat: request match by headers (#16)

[diego-aquino]

Features

• [#zimic] Added support to restrict request trackers by HTTP headers.
• [#zimic] Added support to compare equality and containment of HTTP headers.

Fixes

• [#zimic] Fixed the semantics of search param comparisons. Now param1.contains(param2) returns true only if all key-value pairs of param2 are present in param1, regardless of param1 having more key-pairs than param2. The previous behavior was that param1.contains(param2) would return true only if all key-value pairs of param1 were present in param2, which is not correct because the semantics are reversed.

const creationTracker = authInterceptor
  .post('/users')
  .with({
    headers: { 'content-type': 'application/json' },
  })
  .respond((request) => {
    const user: User = {
      id: crypto.randomUUID(),
      name: request.body.name,
      email: request.body.email,
    };

    return {
      status: 201,
      body: user,
    };
  });

const response = await createUser(creationPayload);
expect(response.status).toBe(201);

Closes #16.