[Laravel] 錯誤解決：Warning from https://repo.packagist.org: You are using an outdated version of Composer. Composer 2 is now available and you should upgrade. See https...

composer提示版本太舊的解決辦法。

解決方法是：升級 composer 版本 composer self-update
查看 composer 版本 composer -V

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☞ 解決composer提示版本太舊You are using an outdated version of Composer. Composer 2.0 is now available and you should upgrade.
☞ 使用 Composer 管理 PHP 套件