build(deps-dev): bump ember-code-snippet from 2.3.1 to 2.4.0
build(deps-dev): bump ember-code-snippet from 2.3.1 to 2.4.0

Bumps [ember-code-snippet](https://github.com/ef4/ember-code-snippet) from 2.3.1 to 2.4.0.
- [Release notes](https://github.com/ef4/ember-code-snippet/releases)
- [Changelog](https://github.com/ef4/ember-code-snippet/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ef4/ember-code-snippet/compare/v2.3.1...v2.4.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
jasonmit/ember-intl,ember-intl/ember-intl,ember-intl/ember-intl,yahoo/ember-intl,yahoo/ember-intl,jasonmit/ember-intl,ember-intl/ember-intl