Update composer.json

Author: BennySama

composer.json

@@ -29,7 +29,7 @@
     "require-dev": {
         "mockery/mockery": "^0.9.5",
         "orchestra/testbench": "3.1.*|3.2.*|3.3.*",
-        "laravel/framework": "5.1.*|5.2.*|5.3.*",
+        "laravel/framework": "5.1.*|5.2.*|5.3.*|5.4.*",
         "phpunit/phpunit": "4.*"
     },
     "autoload": {