homestead 安装 laravel 6.*报错

Declaration of SymfonyComponentTranslationTranslatorInterface::setLocale($locale) must be compatible with SymfonyContractsTranslationLocaleAwareInterface::setLocale(string $locale)

 "require": {
        "php": "^7.2",
        "encore/laravel-admin": "^1.7",
        "fideloper/proxy": "^4.0",
        "laravel/framework": "^6.2",
        "laravel/tinker": "^2.0",
        "symfony/translation": "4.3.8"  //加这行 再 composer update
    },