Bump ember-cli-mirage from 0.4.7 to 1.1.6

Bumps [ember-cli-mirage](https://github.com/miragejs/ember-cli-mirage) from 0.4.7 to 1.1.6.
- [Release notes](https://github.com/miragejs/ember-cli-mirage/releases)
- [Changelog](https://github.com/miragejs/ember-cli-mirage/blob/master/CHANGELOG.md)
- [Commits](miragejs/ember-cli-mirage@v0.4.7...v1.1.6)

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

Author: dependabot-preview[bot]