安装依赖项的编辑器文件无效

我正在尝试安装在这里找到的软件包：

https://cartalyst.com/manual/data-grid/3.0我的作曲家文件如下：

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "laravel/framework": "4.2.*"
,  "barryvdh/laravel-migration-generator": "dev-master", "fzaninotto/faker": "1.2.*@dev", "aws/aws-sdk-php": "2.*", "cartalyst/data-grid": "3.0.*"  },
"repositories": [
    {
        "type": "composer",
        "url": "https://packages.cartalyst.com"
    }
]

    "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"
}

不幸的是，我的 JSON 无效，我在修复它时遇到问题，我已经按照问题开头的链接按照安装说明进行操作，谢谢