build(deps-dev): bump formidable from 3.5.2 to 3.5.4 (#740)

Bumps [formidable](https://github.com/node-formidable/formidable) from 3.5.2 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: direct:development
...

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Author: dependabot[bot]