[tests] Fix format script

tests/package.json

@@ -1,6 +1,9 @@
 {
   "name": "spine-tests",
   "type": "module",
+  "scripts": {
+    "format": "npx -y typescript-formatter -r **/*.ts"
+  },
   "devDependencies": {
     "@types/node": "^20.0.0",
     "tsx": "^4.0.0",