Bump form-data from 4.0.1 to 4.0.6 (#671)

Bumps [form-data](https://github.com/form-data/form-data) from 4.0.1 to 4.0.6.
- [Release notes](https://github.com/form-data/form-data/releases)
- [Changelog](https://github.com/form-data/form-data/blob/master/CHANGELOG.md)
- [Commits](https://github.com/form-data/form-data/compare/v4.0.1...v4.0.6)

---
updated-dependencies:
- dependency-name: form-data
  dependency-version: 4.0.6
  dependency-type: indirect
...

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