Update webmock dependency to version 1.15.0
Update webmock dependency to version 1.15.0

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