Update cz-conventional-changelog to the latest version 🚀 (crisboarna#97)

* chore(package): update cz-conventional-changelog to version 3.1.1

* chore(package): update lockfile package-lock.json

Co-authored-by: greenkeeper[bot] <23040076+greenkeeper[bot]@users.noreply.github.com>

Author: greenkeeper[bot]