我有一个用于laravel安装的composer文件，其中包含以下composer.json文件：

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "require": {
        "laravel/framework": "4.1.*"
    },
    "autoload": {
        "classmap": [
            "app/commands",
            "app/controllers",
            "app/models",
            "app/database/migrations",
            "app/database/seeds",
            "app/tests/TestCase.php"
        ]
    },
    "scripts": {
        "post-install-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "post-create-project-cmd": [
            "php artisan key:generate"
        ]
    },
    "config": {
        "preferred-install": "dist"
    },
    "minimum-stability": "stable"
}

我正在尝试为sentry添加bundle。在sentry的网站上，它说我可以通过将以下内容添加到我的composer.json文件中来安装它：

{
    "require": {
        "cartalyst/sentry": "2.0.*"
    },
    "minimum-stability": "dev"
}

我尝试在当前laravel对象的末尾添加新的json对象，如下所示：

...
},
{
    "require": {
        "cartalyst/sentry": "2.0.*"
    },
    "minimum-stability": "dev"
}

当我运行composer update命令加载新包时，我得到一个错误，说新添加的对象不是有效的json。
如果我将cartalyst/sentry添加到现有的require对象中，它将无法找到sentry包，因为现有的requires具有stable的最小稳定性值。
有没有办法在一个单独的require对象中指定sentry包，该对象的最小稳定性设置为dev？