build(deps-dev): bump ember-composable-helpers from 4.2.0 to 4.2.1
build(deps-dev): bump ember-composable-helpers from 4.2.0 to 4.2.1

Bumps [ember-composable-helpers](https://github.com/DockYard/ember-composable-helpers) from 4.2.0 to 4.2.1.
- [Release notes](https://github.com/DockYard/ember-composable-helpers/releases)
- [Changelog](https://github.com/DockYard/ember-composable-helpers/blob/master/CHANGELOG.md)
- [Commits](https://github.com/DockYard/ember-composable-helpers/compare/v4.2.0...v4.2.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
unchartedcode/ember-cli-mirage,unchartedcode/ember-cli-mirage,samselikoff/ember-cli-mirage,unchartedcode/ember-cli-mirage,unchartedcode/ember-cli-mirage,samselikoff/ember-cli-mirage,samselikoff/ember-cli-mirage,samselikoff/ember-cli-mirage