chore(deps): bump @heroku/http-call from 5.4.0 to 5.5.0 (#195)

Bumps [@heroku/http-call](https://github.com/heroku/http-call) from 5.4.0 to 5.5.0.
- [Release notes](https://github.com/heroku/http-call/releases)
- [Commits](heroku/http-call@v5.4.0...v5.5.0)

---
updated-dependencies:
- dependency-name: "@heroku/http-call"
  dependency-version: 5.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]