Merge pull request #33 from Adizbek/patch-1 Fix MediaManager.php

Merge pull request #32 from Yomag84/patch-1 Path erro

Merge pull request #25 from uacode/master Some security fixes

laravel-admin 2.0 

兼容laravel 6.0 

[fix] Fix issue #16 

Update composer.json 

update readme