Bump @ember/test-helpers from 2.2.4 to 2.2.5 (#594)
Bump @ember/test-helpers from 2.2.4 to 2.2.5 (#594)

Bumps [@ember/test-helpers](https://github.com/emberjs/ember-test-helpers) from 2.2.4 to 2.2.5.
- [Release notes](https://github.com/emberjs/ember-test-helpers/releases)
- [Changelog](https://github.com/emberjs/ember-test-helpers/blob/master/CHANGELOG.md)
- [Commits](https://github.com/emberjs/ember-test-helpers/compare/v2.2.4...v2.2.5)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

Co-authored-by: dependabot-preview[bot] <6a4c1c4838f800d1998274cd5234e1f65c55e90c@users.noreply.github.com>
kpfefferle/ember-octicons,kpfefferle/ember-octicons,kpfefferle/ember-cli-octicons,kpfefferle/ember-cli-octicons