test: phpunit for #54

Author: Greg Bowler

composer.json

@@ -5,12 +5,12 @@
 
 	"require": {
 		"php": ">=8.1",
-		"phpgt/typesafegetter": "^v1.3"
+		"phpgt/typesafegetter": "^v1.2.4"
 	},
 
 	"require-dev": {
 		"phpstan/phpstan": "^v1.8",
-		"phpunit/phpunit": "^v9.5"
+		"phpunit/phpunit": "^10.1"
 	},
 
 	"license": "MIT",