拉拉维尔 5.4 无法安装

Question

将 laravel从 5.3 升级到 5.4。

我被更改composer.json，当我运行作曲家更新时，我遇到了错误。

作曲家.json：

"require": {
        "php": ">=5.6.4",
        "laravel/framework": "5.4.*",
        "laravel/tinker": "~1.0"
},

错误：

git:(upgrade-5.4) ✗ composer install
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
    - Conclusion: don't install symfony/console v3.2.2
    - Installation request for mpociot/laravel-test-factory-helper ^0.3.1 -> satisfiable by mpociot/laravel-test-factory-helper[0.3.1].
    - Conclusion: don't install symfony/console v3.2.1
    - laravel/framework v5.4.6 requires symfony/console ~3.2 -> satisfiable by symfony/console[v3.2.0, v3.2.1, v3.2.2].
    - laravel/framework v5.4.0 requires symfony/console ~3.2 -> satisfiable by symfony/console[v3.2.0, v3.2.1, v3.2.2].
    - laravel/framework v5.4.1 requires symfony/console ~3.2 -> satisfiable by symfony/console[v3.2.0, v3.2.1, v3.2.2].
    - laravel/framework v5.4.2 requires symfony/console ~3.2 -> satisfiable by symfony/console[v3.2.0, v3.2.1, v3.2.2].
    - laravel/framework v5.4.3 requires symfony/console ~3.2 -> satisfiable by symfony/console[v3.2.0, v3.2.1, v3.2.2].
    - laravel/framework v5.4.4 requires symfony/console ~3.2 -> satisfiable by symfony/console[v3.2.0, v3.2.1, v3.2.2].
    - laravel/framework v5.4.5 requires symfony/console ~3.2 -> satisfiable by symfony/console[v3.2.0, v3.2.1, v3.2.2].
    - Conclusion: don't install symfony/console v3.2.0|install symfony/console v3.2.1
    - Installation request for laravel/framework 5.4.* -> satisfiable by laravel/framework[v5.4.0, v5.4.1, v5.4.2, v5.4.3, v5.4.4, v5.4.5, v5.4.6].

Answer 1

从 （dev-？） 依赖项中删除mpociot/laravel-test-factory-helper或将其更新为支持 Laravel 5.4 的版本