chore(deps-dev): bump formidable from 3.5.1 to 3.5.4 in /app

Bumps [formidable](https://github.com/node-formidable/formidable) from 3.5.1 to 3.5.4.
- [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)

---
updated-dependencies:
- dependency-name: formidable
  dependency-version: 3.5.4
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]