Laravel 5.7 安装 JWT 失败？

- don't install illuminate/support v5.2.25|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.2.26|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.2.27|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.2.28|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.2.31|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.2.32|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.2.37|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.2.6|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.2.7|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.5.33|don't install laravel/framework v5.7.9
- don't install illuminate/support v5.5.34|don't install laravel/framework v5.7.9
- Installation request for laravel/framework (locked at v5.7.9, required as 5.7.*) -> satisfiable by laravel/framework[v5.7.9].
- 

Installation failed, reverting ./composer.json to its original content.