build(deps-dev): bump @iobroker/testing from 4.1.3 to 5.0.3 (#757)

Bumps [@iobroker/testing](https://github.com/AlCalzone/testing) from 4.1.3 to 5.0.3.
- [Changelog](https://github.com/ioBroker/testing/blob/master/CHANGELOG.md)
- [Commits](ioBroker/testing@v4.1.3...v5.0.3)

---
updated-dependencies:
- dependency-name: "@iobroker/testing"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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