Bump the tests-qunit group across 1 directory with 2 updates

Bumps the tests-qunit group with 2 updates in the / directory: [grunt-contrib-qunit](https://github.com/gruntjs/grunt-contrib-qunit) and [sinon](https://github.com/sinonjs/sinon).


Updates `grunt-contrib-qunit` from 10.1.1 to 10.2.0
- [Release notes](https://github.com/gruntjs/grunt-contrib-qunit/releases)
- [Changelog](https://github.com/gruntjs/grunt-contrib-qunit/blob/main/CHANGELOG.md)
- [Commits](gruntjs/grunt-contrib-qunit@v10.1.1...v10.2.0)

Updates `sinon` from 16.1.3 to 21.1.2
- [Release notes](https://github.com/sinonjs/sinon/releases)
- [Changelog](https://github.com/sinonjs/sinon/blob/main/docs/changelog.md)
- [Commits](sinonjs/sinon@v16.1.3...v21.1.2)

---
updated-dependencies:
- dependency-name: grunt-contrib-qunit
  dependency-version: 10.2.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: tests-qunit
- dependency-name: sinon
  dependency-version: 21.1.2
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: tests-qunit
...

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Author: dependabot[bot]