Bump qunit-dom from 1.1.0 to 1.6.0
Bump qunit-dom from 1.1.0 to 1.6.0

Bumps [qunit-dom](https://github.com/simplabs/qunit-dom) from 1.1.0 to 1.6.0.
- [Release notes](https://github.com/simplabs/qunit-dom/releases)
- [Changelog](https://github.com/simplabs/qunit-dom/blob/master/CHANGELOG.md)
- [Commits](https://github.com/simplabs/qunit-dom/compare/v1.1.0...v1.6.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
billybonks/ember-cli-stylelint,billybonks/ember-cli-stylelint