Remove outdated dev references to older versions (barryvdh#1508)

Author: mfn

composer.json

@@ -38,8 +38,8 @@
         "illuminate/view": "^9 || ^10",
         "mockery/mockery": "^1.4",
         "orchestra/testbench": "^7 || ^8",
-        "phpunit/phpunit": "^8.5 || ^9",
-        "spatie/phpunit-snapshot-assertions": "^3 || ^4",
+        "phpunit/phpunit": "^9",
+        "spatie/phpunit-snapshot-assertions": "^4",
         "vimeo/psalm": "^5.4"
     },
     "suggest": {