refactor: update test script and replace bun-types with tsx in devDependencies

package.json

@@ -31,14 +31,14 @@
     "mailer": "./bin/mailer-wrapper.js"
   },
   "scripts": {
-    "test": "bun --bun test",
+    "test": "tstest test/ --logfile --verbose --timeout 60",
     "build": "echo 'no build needed'"
   },
   "devDependencies": {
     "@git.zone/tstest": "^2.3.1",
     "@types/node": "^24.0.10",
     "@types/mailparser": "^3.4.6",
-    "bun-types": "^1.3.0"
+    "tsx": "^4.19.2"
   },
   "dependencies": {
     "@api.global/typedrequest": "^3.0.19",