chore(deps-dev): update coveralls requirement from 3.0.5 to 3.0.6
chore(deps-dev): update coveralls requirement from 3.0.5 to 3.0.6

Updates the requirements on [coveralls](https://github.com/nickmerwin/node-coveralls) to permit the latest version.
- [Release notes](https://github.com/nickmerwin/node-coveralls/releases)
- [Commits](https://github.com/nickmerwin/node-coveralls/commits)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
apiaryio/dredd,apiaryio/dredd-transactions,apiaryio/dredd,apiaryio/dredd-transactions,apiaryio/dredd