build(deps-dev): bump @knighted/duel from 2.0.1 to 2.1.5

Bumps [@knighted/duel](https://github.com/knightedcodemonkey/duel) from 2.0.1 to 2.1.5.
- [Release notes](https://github.com/knightedcodemonkey/duel/releases)
- [Commits](knightedcodemonkey/duel@v2.0.1...v2.1.5)

---
updated-dependencies:
- dependency-name: "@knighted/duel"
  dependency-version: 2.1.5
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]