composer更新指定包的相关命令

命令如下：

composer list 显示所有命令
composer show 显示所有包信息
composer install 在 composer.json 配置中添加依赖库之后运行此命令安装
composer create-project laravel/laravel Laravel –prefer-dist “5.1.*” 创建项目
composer search packagename 搜索包
composer update 更新所有包
composer update monolog/monolog 更新指定包
composer remove monolog/monolog 移除指定的包
composer require monolog/monolog 添加指定包
composer require monolog/monolog:1.19 添加指定包和版本
composer require monolog/monolog=1.19
composer require monolog/monolog 1.19

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