Update README.md

Author: nunomazer

README.md

@@ -19,7 +19,7 @@ Add the following in the require section of your **composer.json**:
 ```json
 "uepg/laravel-sybase": "~1.0"
 ```
-### Laravel 5.4, 5.5, 5.6, 5.7
+### Laravel 5.4, 5.5, 5.6, 5.7, 5.8
 
 ```json
 "uepg/laravel-sybase": "~2.0"