chore(deps-dev): bump @ember/test-waiters from 3.1.0 to 4.1.0

Bumps [@ember/test-waiters](https://github.com/emberjs/ember-test-waiters) from 3.1.0 to 4.1.0.
- [Release notes](https://github.com/emberjs/ember-test-waiters/releases)
- [Changelog](https://github.com/emberjs/ember-test-waiters/blob/master/CHANGELOG.md)
- [Commits](https://github.com/emberjs/ember-test-waiters/commits)

---
updated-dependencies:
- dependency-name: "@ember/test-waiters"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]