Bump @ember/test-helpers from 2.2.5 to 2.2.6 (#783)
Bump @ember/test-helpers from 2.2.5 to 2.2.6 (#783)

Bumps [@ember/test-helpers](https://github.com/emberjs/ember-test-helpers) from 2.2.5 to 2.2.6.
- [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/v2.2.5...v2.2.6)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
shipshapecode/ember-flatpickr,shipshapecode/ember-flatpickr,shipshapecode/ember-flatpickr