hyperf3.0版本无法安装

```
925f49e33ed5:/data/project/hyperf-skeleton# php bin/hyperf.php --version
[DEBUG] [command] Commands registered by Hyperf\Command\Listener\RegisterCommandListener
[DEBUG] Event Hyperf\Framework\Event\BootApplication handled by Hyperf\Command\Listener\RegisterCommandListener listener.
[DEBUG] Event Hyperf\Framework\Event\BootApplication handled by Hyperf\Config\Listener\RegisterPropertyHandlerListener listener.
  Problem 1
    - hyperf-ext/encryption[v2.0.0, ..., v2.0.1] require hyperf/command ^2.0 -> found hyperf/command[v2.0.0, ..., 2.2.x-dev] but it conflicts with your root composer.json require (~3.1.0).
    - hyperf-ext/encryption v2.1.0 requires hyperf/command ~2.1.0 -> found hyperf/command[v2.1.0-beta1, v2.1.0, 2.1.x-dev] but it conflicts with your root composer.json require (~3.1.0).
    - hyperf-ext/encryption[dev-master, v2.2.0, ..., v2.2.1] require hyperf/command ~2.2.0 -> found hyperf/command[v2.2.0-beta1, ..., 2.2.x-dev] but it conflicts with your root composer.json require (~3.1.0).
    - Root composer.json requires hyperf-ext/encryption * -> satisfiable by hyperf-ext/encryption[dev-master, v2.0.0, ..., v2.2.1, 9999999-dev].

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.
You can also try re-running composer require with an explicit version constraint, e.g. "composer require hyperf-ext/encryption:*" to figure out if any version is installable, or "composer require hyperf-ext/encryption:^2.1" if you know which you need.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.

```

php-lib/hyperf-encryption

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