[1.3.x] errors.status should be a string

[nelson6e65]

The JSON:API specification states:

"[...] the HTTP status code applicable to this problem, expressed as a string value"

But in the JSON response, it is a number instead of string.

{
  "errors": [
    {
      "status": 501
    }
  ]
}

And if I use string, I get this warning:

Warning express deprecated res.status("501"): use res.status(501) instead

😅