BC Callback: request, response, ...args

[vanodevium]

Breaking changes

Closes #13

Useful for headers, status code and other purposes.
$response is an instance of \Workerman\Protocols\Http\Response

Example of JSON endpoint:

$api->get('/json', function ($request, $response) {
    return $response->withHeader('Content-Type', 'application/json')
                    ->withBody(json_encode(['a' => 1, 'b' => 2]));
});

Breaking changes