Build(deps-dev): bump ember-bootstrap from 3.1.1 to 3.1.2
Build(deps-dev): bump ember-bootstrap from 3.1.1 to 3.1.2

Bumps [ember-bootstrap](https://github.com/kaliber5/ember-bootstrap) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/kaliber5/ember-bootstrap/releases)
- [Changelog](https://github.com/kaliber5/ember-bootstrap/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kaliber5/ember-bootstrap/compare/3.1.1...3.1.2)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
simplabs/ember-simple-auth,simplabs/ember-simple-auth