[fix] don't change the requrest url hash

## Describe the bug
```ts
import request from 'supertest';
import express from 'express';

const app = express();

app.use((req, res, next) => {
console.log(req.url);
return next();
});

await request(app).get('/path/to.html?q=1#hash');
```

expect `console.log(req.url);` should output `'/path/to.html?q=1#hash'`
but got `'/path/to.html?q=1'`

## Checklist

- [x] I have searched through GitHub issues for similar issues.
- [x] I have completely read through the README and documentation.
- [x] I have tested my code with the latest version of Node.js and this package and confirmed it is still not working.