Don't Support laravel 5.8

[badrizahra]

I want to install it in my project with laravel 5.8 , but face with this errors in composer update :

- don't install illuminate/support v5.0.4|don't install laravel/framework v5.8.11
- Installation request for laravel/framework (locked at v5.8.11, required as 5.8.*) -> satisfiable by laravel/framework[v5.8.11].
- Installation request for pqb/filemanager-laravel ^2.0 -> satisfiable by pqb/filemanager-laravel[2.0, 2.0.1, 2.0.10, 2.0.11, 2.0.12, 2.0.2, 2.0.3, 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.0.8, 2.0.9].