chore(deps-dev): bump supertest from 6.1.4 to 6.1.5

Bumps [supertest](https://github.com/visionmedia/supertest) from 6.1.4 to 6.1.5.
- [Release notes](https://github.com/visionmedia/supertest/releases)
- [Commits](ladjs/supertest@v6.1.4...v6.1.5)

---
updated-dependencies:
- dependency-name: supertest
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]