Add to "composer.json" file
"repositories": [
{
"type": "vcs",
"url": "https://github.com/Deepelopment/XML"
}
],
"require": {
"Deepelopment/XML": "dev-develop"
},
"scripts": {
"post-install-cmd": "Deepelopment\\Composer_XML::postInstall",
"pre-update-cmd": "Deepelopment\\Composer_XML::preUpdate"
}