laravel-6 support

vendor/unisharp/laravel-filemanager/docs/upgrade.md

@@ -1,19 +1,23 @@
 ## Upgrade instructions
 
   1. Please backup your own `config/lfm.php` before upgrading.
-  
+
   1. Run commands:
 
       ```bash
       composer update unisharp/laravel-filemanager
-      
+
       php artisan vendor:publish --tag=lfm_view --force
       php artisan vendor:publish --tag=lfm_public --force
       php artisan vendor:publish --tag=lfm_config --force
-      
+
       php artisan route:clear
       php artisan config:clear
       ```
- 
+
   1. Clear browser cache if page is broken after upgrading.
 
+## Errors with namespace
+We have changed namespace from `Unisharp` to `UniSharp`, and change the first character of every namespace into capital.
+
+If you are updating this package and encounter any errors like `Class not found`, please remove this package entirely and reinstall again.