chore(deps-dev): bump @ember/test-helpers from 2.9.3 to 2.9.4#957

dependabot[bot] wants to merge 1 commit intomainember-cli/ember-resolver:mainfrom

dependabot/npm_and_yarn/ember/test-helpers-2.9.4ember-cli/ember-resolver:dependabot/npm_and_yarn/ember/test-helpers-2.9.4Copy head branch name to clipboard