Update Changelog.md
Update Changelog.md
Greenalin/ember-cli-acceptance-test-helpers,201-created/ember-cli-acceptance-test-helpers,givanse/ember-cli-acceptance-test-helpers,BryanCrotaz/ember-cli-acceptance-test-helpers,givanse/ember-cli-acceptance-test-helpers,BryanCrotaz/ember-cli-acceptance-test-helpers,Greenalin/ember-cli-acceptance-test-helpers,rwjblue/ember-cli-acceptance-test-helpers,rwjblue/ember-cli-acceptance-test-helpers,201-created/ember-cli-acceptance-test-helpers