title: symfony 5.2 unrecognized option 'http_version' under framework.http_client
body: <p>I'm trying to implement async HTTP client with Symfony and <a href="https://amphp.org/http-client/" rel="nofollow noreferrer">amphp/http-client</a>, in <a href="https://symfony.com/doc/current/http_client.html#http-2-support" rel="nofollow noreferrer">symfony docs</a> said thatto enable it for HTTP I need to add <code>http_version: '2.0'</code>option to config and I did it:</p>
  <pre><code>framework:
      http_client:
          http_version: '2.0'
          scoped_clients:
              site:
                  base_uri: '%env(URL)%'
                  headers:
                      x-access-token: '%env(ACCESS_TOKEN)%'
  
  </code></pre>
  <p>but it's not working and I'm getting error  <code> Unrecognized option &quot;http_version&quot; under &quot;framework.http_client&quot;. Available options are &quot;default_options&quot;, &quot;enabled&quot;, &quot;max_host_connections&quot;, &quot;mock_response_factory&quot;, &quot;scoped_clients&quot;.  </code></p>
  <p>Any idea what is wrong?? Thanks in advance!</p>