Bump testdouble from 3.2.2 to 3.8.2 (#297)
Bump testdouble from 3.2.2 to 3.8.2 (#297)

Bumps [testdouble](https://github.com/testdouble/testdouble.js) from 3.2.2 to 3.8.2.
- [Release notes](https://github.com/testdouble/testdouble.js/releases)
- [Changelog](https://github.com/testdouble/testdouble.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/testdouble/testdouble.js/compare/v3.2.2...v3.8.2)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
ember-cli/ember-cli-eslint,jonathanKingston/ember-cli-eslint,jonathanKingston/ember-cli-eslint,ember-cli/ember-cli-eslint