Bump form-data and @glennsl/bs-jest in /exercises/practice/triangle (#367)

---
updated-dependencies:
- dependency-name: form-data
  dependency-version: 3.0.4
  dependency-type: indirect
- dependency-name: "@glennsl/bs-jest"
  dependency-version: 0.7.0
  dependency-type: direct:development
...

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