security(deps): bump formidable and superagent

Bumps [formidable](https://github.com/node-formidable/formidable) to 3.5.1 and updates ancestor dependency [superagent](https://github.com/ladjs/superagent). These dependencies need to be updated together.


Updates `formidable` from 2.1.2 to 3.5.1
- [Release notes](https://github.com/node-formidable/formidable/releases)
- [Changelog](https://github.com/node-formidable/formidable/blob/master/CHANGELOG.md)
- [Commits](https://github.com/node-formidable/formidable/commits/v3.5.1)

Updates `superagent` from 8.1.2 to 9.0.1
- [Release notes](https://github.com/ladjs/superagent/releases)
- [Changelog](https://github.com/ladjs/superagent/blob/master/HISTORY.md)
- [Commits](ladjs/superagent@v8.1.2...v9.0.1)

---
updated-dependencies:
- dependency-name: formidable
  dependency-type: indirect
- dependency-name: superagent
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -254,7 +254,7 @@
     "rimraf": "^2.6.3",
     "should": "*",
     "sinon": "^4.5.0",
-    "superagent": "^8.1.2",
+    "superagent": "^9.0.1",
     "tap": "^16.3.4",
     "temp": "^0.8.1",
     "when": "*"