Update multi_json dependency to version 1.3.7
Update multi_json dependency to version 1.3.7

jasnow/follow-all,codeforamerica/follow-all,BryanH/follow-all,BryanH/follow-all,jasnow/follow-all,codeforamerica/follow-all,codeforamerica/follow-all,BryanH/follow-all,jasnow/follow-all