Currently the `participants()` method is using `http_get()`. Should it use `http_list()`? I'm thinking yes. @nejch What do you think? https://docs.gitlab.com/ee/api/merge_requests.html#get-single-merge-request-participants https://github.com/python-gitlab/python-gitlab/blob/51d8f888aca469cff1c5ee5e158fb259d2862017/gitlab/mixins.py#L914-L935 Possibly related is #2912