Update express dependency to version 4.22.1

[hardillb]

Bump to pick up CVE fix for downstream projects

[dceejay]

saw you bumped main one to 4.22.1 ... may as well do same here

[hlovdal]

For reference:

npm audit 
# npm audit report

qs  <6.14.1
Severity: high
qs's arrayLimit bypass in its bracket notation allows DoS via memory exhaustion - https://github.com/advisories/GHSA-6rw7-vpxm-498p
...

and

npm ls -a
...
├─┬ node-red-node-test-helper@0.3.5
│ ├─┬ body-parser@1.20.3
...
│ │ ├─┬ qs@6.13.0
...

Temporary workaround while waiting for this pull request to be completed and releases, add

  ...
  "overrides": {
    "node-red-node-test-helper": {
      "body-parser": "1.20.4"
     }
  },
  ....

to package.json.

[hlovdal]

@hardillb You might preferably also bump body-parser to ^1.20.4 since that version fixes a qs security dependency.