working group for racket community survey <https://gitlab.com/racket-news/racket-survey-2019> wg-racket-survey-2019/2019-09-11.htmlwg-racket-survey-2019/2019-09-17.htmlwg-racket-survey-2019/2019-09-18.htmlwg-racket-survey-2019/2020-04-18.html