Bump dotenv from 8.2.0 to 16.3.1 in /services/idp

Bumps [dotenv](https://github.com/motdotla/dotenv) from 8.2.0 to 16.3.1.
- [Changelog](https://github.com/motdotla/dotenv/blob/master/CHANGELOG.md)
- [Commits](https://github.com/motdotla/dotenv/compare/v8.2.0...v16.3.1)

---
updated-dependencies:
- dependency-name: dotenv
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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