TP5.1 查看具体版本
https://blog.csdn.net/haibo0668/article/details/80865785
echo \think\facade\App::version();
composer.lock中搜索topthink/framework
https://blog.csdn.net/haibo0668/article/details/80865785
echo \think\facade\App::version();
composer.lock中搜索topthink/framework