GitLab codestyle (prettier)
Following approach from:
- https://gitlab.com/gitlab-org/gitter/gitter-webhooks-handler/merge_requests/36
- https://gitlab.com/gitlab-org/gitter/env/merge_requests/20
- https://gitlab.com/gitlab-org/gitter/developer-gitter-im/merge_requests/27
Best to review by commits and. The only one where made a change to the production code is fa07c657 to be able to keep the rule preventing usage of var.
Edited by Eric Eastwood