open handles with body-parser#1.20.0

Hallo,

jest test run does not exit and instead prints this error

```
Jest has detected the following 64 open handles potentially keeping Jest from exiting:
● bound-anonymous-fn
23 |
24 | const response = await request
> 25 | .post('/gql')
| ^
26 | .set('origin', config.devHosts[0])
27 | .send(loginQuery)
28 | .expect(200);
at Test.serverAddress (node_modules/supertest/lib/test.js:48:35)
at new Test (node_modules/supertest/lib/test.js:34:14)
at Object.post (node_modules/supertest/index.js:28:14)
at login (test/integration/helpers/login.js:25:6)
at Object. (test/integration/users/usersMutations.itest.js:45:25)
at runMicrotasks ()
...
```

We have found this happens only for the routes where we use the express `body-parser` middleware.
express version = 4.17.3
body-parser version = 1.20.0