update readme

Author: michaeldyrynda

README.md

@@ -9,7 +9,7 @@ This preset scaffolding removes the manual steps required to get up and running
 
 ## Usage
 
-1. Fresh install Laravel >= 5.8 and cd to your app.
+1. Fresh install Laravel >= 6.0 and cd to your app.
 2. Install this preset via `composer require laravel-frontend-presets/inertiajs`. Laravel will automatically discover this package. No need to register the service provider.
 
 ### Installation