从Laravel 5.2降级回5.1

Question

从Laravel 5.2降级回5.1，我使用Omnipay

但它与Laravel 5.2 / Symfony 3不兼容。

或者配置了symfony / http-foundation：2.8。*，我知道它是兼容的。

我的composer.json

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "php": ">=5.5.9",
        "laravel/framework": "5.2.*",
        "intervention/image": "^2.3",
        "fzaninotto/faker": "^1.6",
        "jrean/laravel-user-verification": "^2.2",
        "guzzlehttp/guzzle": "~5.3|~6.0",
        "zgabievi/promocodes": "^0.1.5",
        "greggilbert/recaptcha": "dev-master",
        "barryvdh/laravel-dompdf": "0.6.*",
        "omnipay/omnipay": "~2.0",
        "dabsquared/omnipay-cybersource-soap": "dev-master"
    },
    "require-dev": {
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~4.0",
        "symfony/css-selector": "2.8.*|3.0.*",
        "symfony/dom-crawler": "2.8.*|3.0.*"
    },
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "classmap": [
            "tests/TestCase.php"
        ]
    },
    "scripts": {
        "post-root-package-install": [
            "php -r \"copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "php artisan key:generate"
        ],
        "post-install-cmd": [
            "Illuminate\\Foundation\\ComposerScripts::postInstall",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "Illuminate\\Foundation\\ComposerScripts::postUpdate",
            "php artisan optimize"
        ]
    },
    "config": {
        "preferred-install": "dist"
    }
}