ci: use explicit node test file

Author: rockyshi1993

package.json

@@ -15,7 +15,7 @@
     "LICENSE"
   ],
   "scripts": {
-    "test": "node --test test",
+    "test": "node --test test/index.test.js",
     "test:audit": "npm audit --audit-level=moderate --registry=https://registry.npmjs.org/",
     "pack:dry": "npm pack --dry-run",
     "test:release": "npm test && npm run test:audit && npm run pack:dry",