Bump ember-cli from 3.28.3 to 3.28.4
Bump ember-cli from 3.28.3 to 3.28.4

Bumps [ember-cli](https://github.com/ember-cli/ember-cli) from 3.28.3 to 3.28.4.
- [Release notes](https://github.com/ember-cli/ember-cli/releases)
- [Changelog](https://github.com/ember-cli/ember-cli/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ember-cli/ember-cli/compare/v3.28.3...v3.28.4)

---
updated-dependencies:
- dependency-name: ember-cli
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
calvinlough/ember-tag-input,calvinlough/ember-tag-input