我使用的是 mac，在命令行中，我登录到服务器，想安装作曲家，但是我遇到了一些问题（见下文）。我不需要 PHP 单元，所以我也尝试过composer install --no-dev，但出现了同样的错误。任何想法或解决方案？
Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. It is recommended that you run `composer update` or `composer update <package name>`.
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Installation request for tijsverkoyen/css-to-inline-styles 2.2.2 -> satisfiable by tijsverkoyen/css-to-inline-styles[2.2.2].
- tijsverkoyen/css-to-inline-styles 2.2.2 requires ext-dom * -> the requested PHP extension dom is missing from your system.
Problem 2
- tijsverkoyen/css-to-inline-styles 2.2.2 requires ext-dom * -> the requested PHP extension dom is missing from your system.
- laravel/framework v7.3.0 requires tijsverkoyen/css-to-inline-styles ^2.2.2 -> satisfiable by tijsverkoyen/css-to-inline-styles[2.2.2].
- Installation request for laravel/framework v7.3.0 -> satisfiable by laravel/framework[v7.3.0].
我还尝试通过 Sudo 安装 tijsverkoyen 并收到另一个问题列表
Problem 1
- phpunit/phpunit 8.5.x-dev requires ext-dom * -> the requested PHP extension dom is missing from your system.
- phpunit/phpunit 8.5.3 requires ext-dom * -> the requested PHP extension dom is missing from your system.
- phpunit/phpunit 8.5.2 requires ext-dom * -> the requested PHP extension dom is missing from your system.
- phpunit/phpunit 8.5.1 requires ext-dom * -> the requested PHP extension dom is missing from your system.
- phpunit/phpunit 8.5.0 requires ext-dom * -> the requested PHP extension dom is missing from your system.
- Installation request for phpunit/phpunit ^8.5 -> satisfiable by phpunit/phpunit[8.5.0, 8.5.1, 8.5.2, 8.5.3, 8.5.x-dev].
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