bump orchestra/testbench dev dependency

Author: tabacitu

composer.json

@@ -46,7 +46,7 @@
     "require-dev": {
         "phpunit/phpunit": "~8.0",
         "scrutinizer/ocular": "~1.1",
-        "orchestra/testbench": "^4.0",
+        "orchestra/testbench": "^5.0",
         "orchestra/database": "^4.0",
         "spatie/laravel-translatable": "^4.0"
     },