Update composer.json

Author: mpociot

composer.json

@@ -19,7 +19,7 @@
         "php": "^7.1",
         "composer/semver": "^1.4",
         "geerlingguy/ping": "^1.1",
-        "illuminate/support": "5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*|5.8.*",
+        "illuminate/support": "5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*|5.8.*|^6.0",
         "vlucas/phpdotenv": "~2.5|~3.3"
     },
     "require-dev": {