title: Angular 4 doesn't include headers to http request
body: <p>I am trying very simple angular 4 http request.
  When i check chrome developer tools, i couldn't see http headers.</p>
  
  <pre><code>const headers: Headers = new Headers();
  headers.append('Content-Type', 'application/json');
  headers.append('Authorization', 'Bearer: 123213');
  this.http.post('https://127.0.0.1:502', JSON.stringify(token), {headers: headers}).subscribe();
  </code></pre>
  
  <p>am i missing something?</p>