Update versions of dev dependencies

Author: epicentre

composer.json

@@ -29,8 +29,8 @@
         "twilio/sdk": "^7.0"
     },
     "require-dev": {
-        "orchestra/testbench": "^8.5",
-        "phpunit/phpunit": "^10.1"
+        "orchestra/testbench": "^8.0",
+        "phpunit/phpunit": "^10.0"
     },
     "config": {
         "sort-packages": true