通过composer安装barryvdh/laravel-ide助手时遇到问题-在laravel 4项目中找不到类错误

我有以下composer.json文件用于我的Laravel 4.2.x项目：

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "laravel/framework": "4.2.*",
        "cartalyst/sentry": "2.1.*",
        "way/generators": "2.*",
        "laracasts/flash": "~1.0",
        "guzzlehttp/guzzle": "~4.0",
        "itsgoingd/clockwork": "1.*",
        "barryvdh/laravel-ide-helper": "~1.11@dev",
        "intervention/image": "dev-master"
    },
    "autoload": {
        "classmap": [
            "app/commands",
            "app/controllers",
            "app/models",
            "app/database/migrations",
            "app/database/seeds",
            "app/tests/TestCase.php"
        ],
        "files": [
            "app/Latheesan/helpers.php"
        ],
        "psr-0": {
            "Latheesan": "app/"
        }
    },
    "scripts": {
        "post-install-cmd": [
            "php artisan clear-compiled",
            "php artisan ide-helper:generate",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "php artisan clear-compiled",
            "php artisan ide-helper:generate",
            "php artisan optimize"
        ],
        "post-create-project-cmd": [
            "php artisan key:generate"
        ]
    },
    "config": {
        "preferred-install": "dist"
    },
    "minimum-stability": "dev"
}

直到今天这一切都很顺利。当我运行composer update命令时，我得到了以下错误：

｛"error"：｛"type"："Symfony''Component''Debug''Exception''FatalErrorException"，"message"："类"Barryvdh''LaravelIdeHelper''IdeHelperServiceProvider"不是found"，"file"："C:''wamp''www''projectfolder''vendor''laravel''framework''src''Illuminate''Foundation''ProviderRepository.php"，"line"：157｝｝脚本php artisan clear编译处理更新后返回的cmd事件错误

看起来导致问题的包是barryvdh/laravel-ide-helper版本~1.11@dev

在github上的项目主页上，它写道：

对于Laravel 4.x，请检查版本1.8

但这似乎是一个死胡同。

那么，对于这个支持laravel 4.x的包，在composer.json文件上使用的正确的require行是什么呢？