Update multi_json dependency to version 1.7.0
Update multi_json dependency to version 1.7.0

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