Fixed #30

[shinsenter]

Manually add defer.js library script tag

In some regions, you may want to serve defer.js library locally due to The General Data Protection Regulation (EU).

// Include the library
require_once __DIR__ . '/vendor/shinsenter/defer.php/defer.php';

// Create a Defer object
$defer = new \shinsenter\Defer();
$defer->manually_add_deferjs = true;

// Then get the optimized output
$result = $defer->fromHtml(file_get_contents('mypage.html'))->toHtml();
var_dump($result);