v1.6.0

• Feature: Add factory methods for common HTML/JSON/plaintext/XML response types.
  (#439 by @clue)

  $response = React\Http\Response\html("<h1>Hello wörld!</h1>\n");
  $response = React\Http\Response\json(['message' => 'Hello wörld!']);
  $response = React\Http\Response\plaintext("Hello wörld!\n");
  $response = React\Http\Response\xml("<message>Hello wörld!</message>\n");
  

• Feature: Expose all status code constants via Response class.
  (#432 by @clue)

  $response = new React\Http\Message\Response(
      React\Http\Message\Response::STATUS_OK, // 200 OK
      …
  );
  $response = new React\Http\Message\Response(
      React\Http\Message\Response::STATUS_NOT_FOUND, // 404 Not Found
      …
  );
  

• Feature: Full support for PHP 8.1 release.
  (#433 by @SimonFrings and #434 by @clue)

• Feature / Fix: Improve protocol handling for HTTP responses with no body.
  (#429 and #430 by @clue)

• Internal refactoring and internal improvements for handling requests and responses.
  (#422 by @WyriHaximus and #431 by @clue)

• Improve documentation, update proxy examples, include error reporting in examples.
  (#420, #424, #426, and #427 by @clue)

• Update test suite to use default loop.
  (#438 by @clue)