更新一下 composer 工具版本：composer self-update
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Warning from https://mirrors.aliyun.com/composer: Support for Composer 1 is deprecated and some packages will not be available. You should upgrade to Composer 2.
Warning from https://repo.packagist.org: Support for Composer 1 is deprecated and some packages will not be available. You should upgrade to Composer
執行composer install/update 命令遇 "You are using an outdated version of Composer. Composer 2.0 is abo...
WARNING: You are using pip version 19.1.1, however version 19.2.1 is available. You should consider upgrading via the 'pip install --upgrade pip' command.
WARNING: You are using pip version 20.2.2; however, version 20.2.3 is available. You should consider upgrading via the '/usr/bin/python -m pip install --upgrade pip' command.
解決：使用pip命令安裝第三方庫時報錯WARNING: You are using pip version 19.2.3, however version 20.1.1 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command.
You are using pip version 10.0.1, however version 18.1 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command.解決方法
解決You are using pip version 10.0.1, however version 18.1 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command.
You are using pip version 9.0.1, however version 18.0 is available. You should consider upgrading via the 'pip install --upgrade pip' command.
解決Python中出現的問題： “You are using pip version 9.0.1, however version 19.2.3 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command.”