build(deps-dev): bump @iobroker/testing from 2.6.0 to 4.1.0

Bumps [@iobroker/testing](https://github.com/AlCalzone/testing) from 2.6.0 to 4.1.0.
- [Release notes](https://github.com/AlCalzone/testing/releases)
- [Changelog](https://github.com/ioBroker/testing/blob/master/CHANGELOG.md)
- [Commits](ioBroker/testing@v2.6.0...v4.1.0)

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

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