framework/extensions/lang-english/composer.json

{
    "name": "flarum/english",
    "type": "flarum-extension",
    "description": "English language pack.",
    "license": "MIT",
    "require": {
        "composer/installers": "dev-master"
    },
    "extra": {
        "flarum-extension": {
            "title": "English",
            "icon": {
                "backgroundImage": "url('{$assets}/icon.svg')",
                "backgroundSize": "cover",
                "backgroundPosition": "center"
            }
        },
        "flarum-locale": {
            "code": "en",
            "title": "English"
        }
    },
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/tobscure/installers"
        }
    ]
}