Bump qunit from 2.20.1 to 2.21.0

Bumps [qunit](https://github.com/qunitjs/qunit) from 2.20.1 to 2.21.0.
- [Release notes](https://github.com/qunitjs/qunit/releases)
- [Changelog](https://github.com/qunitjs/qunit/blob/main/History.md)
- [Commits](qunitjs/qunit@2.20.1...2.21.0)

---
updated-dependencies:
- dependency-name: qunit
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

yarn.lock

@@ -8655,9 +8655,9 @@ qunit-dom@^3.0.0:
   integrity sha512-urHvzhDxihYrMBpsT/Fk7So79CPfvS0ZwZw2VPA+0JV1Q1XP2IhDg/PLHTt+r2j7787iQAOpILx2GjwAa6CpnA==
 
 qunit@^2.20.1:
-  version "2.20.1"
-  resolved "https://registry.yarnpkg.com/qunit/-/qunit-2.20.1.tgz#280da17c258535f2c14520f018d2eec1191b20cf"
-  integrity sha512-scZfyhX8mmP3u/CN2y3CutQb+ppalbpqmm7g/X62M2yOt8ofzsxrRaC+MPmYm/tXxpzs9HGrVeCxZwLoP0tuAA==
+  version "2.21.0"
+  resolved "https://registry.yarnpkg.com/qunit/-/qunit-2.21.0.tgz#c3d35adb1c9df8176459665f2daf33170c0f8662"
+  integrity sha512-kJJ+uzx5xDWk0oRrbOZ3zsm+imPULE58ZMIrNl+3POZl4a1k6VXj2E4OiqTmZ9j6hh9egE3kNgnAti9Q+BG6Yw==
   dependencies:
     commander "7.2.0"
     node-watch "0.7.3"