chore(deps-dev): bump supertest from 6.0.1 to 6.1.3 (#190)

Bumps [supertest](https://github.com/visionmedia/supertest) from 6.0.1 to 6.1.3.
- [Release notes](https://github.com/visionmedia/supertest/releases)
- [Commits](ladjs/supertest@v6.0.1...v6.1.3)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]