Bump qunit-dom from 1.2.0 to 1.4.0

Bumps [qunit-dom](https://github.com/simplabs/qunit-dom) from 1.2.0 to 1.4.0.
- [Release notes](https://github.com/simplabs/qunit-dom/releases)
- [Changelog](https://github.com/simplabs/qunit-dom/blob/master/CHANGELOG.md)
- [Commits](mainmatter/qunit-dom@v1.2.0...v1.4.0)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -105,7 +105,7 @@
     "postcss-nested": "^4.2.3",
     "prettier": "^2.0.5",
     "qunit-console-grouper": "^0.2.0",
-    "qunit-dom": "^1.2.0",
+    "qunit-dom": "^1.4.0",
     "sass": "^1.26.10",
     "semver": "^7.3.2",
     "timekeeper": "^2.2.0"