Bump serialize-javascript, ember-auto-import and ember-qunit in /client

Bumps [serialize-javascript](https://github.com/yahoo/serialize-javascript) to 6.0.2 and updates ancestor dependencies [serialize-javascript](https://github.com/yahoo/serialize-javascript), [ember-auto-import](https://github.com/embroider-build/ember-auto-import/tree/HEAD/packages/ember-auto-import) and [ember-qunit](https://github.com/emberjs/ember-qunit). These dependencies need to be updated together.


Updates `serialize-javascript` from 4.0.0 to 6.0.2
- [Release notes](https://github.com/yahoo/serialize-javascript/releases)
- [Commits](yahoo/serialize-javascript@v4.0.0...v6.0.2)

Updates `ember-auto-import` from 1.12.2 to 2.10.0
- [Release notes](https://github.com/embroider-build/ember-auto-import/releases)
- [Changelog](https://github.com/embroider-build/ember-auto-import/blob/main/packages/ember-auto-import/CHANGELOG.md)
- [Commits](https://github.com/embroider-build/ember-auto-import/commits/HEAD/packages/ember-auto-import)

Updates `ember-qunit` from 5.1.5 to 9.0.1
- [Release notes](https://github.com/emberjs/ember-qunit/releases)
- [Commits](emberjs/ember-qunit@v5.1.5...v9.0.1)

---
updated-dependencies:
- dependency-name: serialize-javascript
  dependency-type: indirect
- dependency-name: ember-auto-import
  dependency-type: direct:development
- dependency-name: ember-qunit
  dependency-type: direct:development
...

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