Update multi_json dependency to version 1.7.7
Update multi_json dependency to version 1.7.7

Stackato-Apps/adopt-a-hydrant,codeforanchorage/adopt-a-hydrant,OpenTwinCities/adopt-a-tree,jasnow/adopt-a-hydrant,codefornigeria/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,billyfung/van-racks,jamiekelly/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,eebbesen/adopt-a-tree,HackMichiana/adopt-a-bus-stop,0111001101111010/adopt-a-spot-odu,akintoey/adopt-a-hydrant,CostantinB/adopt-a-hydrant,OpenTwinCities/adopt-a-tree,voyera/adopt-a-hydrant,jasnow/adopt-a-hydrant,voyera/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,Bryanprz/adopt-a-street,friendlycode/adopt-a-hydrant,eebbesen/adopt-a-tree,codefornigeria/adopt-a-hydrant,CostantinB/adopt-a-hydrant,codeforamerica/adopt-a-hydrant,Bryanprz/adopt-a-street,baraka101/dar-adopt-a-mtaro,friendlycode/adopt-a-hydrant,codeforanchorage/adopt-a-hydrant,OpenTwinCities/adopt-a-tree,jamiekelly/adopt-a-hydrant,billyfung/van-racks,t-pfaff/adopt-a-hydrant,codeforamerica/adopt-a-hydrant,jasnow/adopt-a-hydrant,HackMichiana/adopt-a-bus-stop,billyfung/van-racks,baraka101/dar-adopt-a-mtaro,CostantinB/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,codeforamerica/adopt-a-hydrant,codefornigeria/adopt-a-hydrant,eebbesen/adopt-a-tree,jamiekelly/adopt-a-hydrant,voyera/adopt-a-hydrant,Bryanprz/adopt-a-street,akintoey/adopt-a-hydrant,akintoey/adopt-a-hydrant,0111001101111010/adopt-a-spot-odu,OpenTwinCities/adopt-a-tree,friendlycode/adopt-a-hydrant