Laravel 6 support

Author: DivineOmega

composer.json

@@ -3,7 +3,7 @@
     "description": "Laravel validation rule that checks if a string is offensive.",
     "type": "library",
     "require": {
-        "illuminate/contracts": "^5.5",
+        "laravel/framework": "^5.5||^6.0",
         "divineomega/is_offensive": "^1.4.0"
     },
     "require-dev": {