Update composer.json

Co-Authored-By: Roelof <[email protected]>

Author: Wim

composer.json

@@ -55,7 +55,7 @@
     },
     "require": {
         "php": ">=7.1.0",
-        "laravel/framework": "5.5.*|5.6.*|5.7.*|5.8.*|6.*.*"
+        "laravel/framework": "5.5.*|5.6.*|5.7.*|5.8.*|^6.0"
     },
     "require-dev": {
         "codeclimate/php-test-reporter": "dev-master",