Update composer.json

Author: rennokki

composer.json

@@ -37,7 +37,7 @@
         "test": "vendor/bin/phpunit"
     },
     "require-dev": {
-        "chelout/laravel-relationship-events": "^1.4",
+        "chelout/laravel-relationship-events": "^1.5",
         "laravel/legacy-factories": "^1.3",
         "mockery/mockery": "^1.5",
         "orchestra/database": "^6.0",