Update mail dependency to version 2.2.16
Update mail dependency to version 2.2.16

baraka101/dar-adopt-a-mtaro,OpenTwinCities/adopt-a-tree,mapmeld/Adopt-a-Siren-Macon,t-pfaff/adopt-a-hydrant,OpenTwinCities/adopt-a-tree,akintoey/adopt-a-hydrant,jamiekelly/adopt-a-hydrant,siruguri/adopt-a-drain,HackMichiana/adopt-a-bus-stop,openoakland/adopt-a-drain,jasnow/adopt-a-hydrant,HackMichiana/adopt-a-bus-stop,voyera/adopt-a-hydrant,openshift-quickstart/adopt-a-hydrant-openshift-quickstart,billyfung/van-racks,jamiekelly/adopt-a-hydrant,0111001101111010/adopt-a-spot-odu,siruguri/adopt-a-drain,codeforsavannah/adopt-a-garden,friendlycode/adopt-a-hydrant,jasnow/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,billyfung/van-racks,codeforamerica/adopt-a-siren,code4sac/adopt-a-light,akintoey/adopt-a-hydrant,OpenTwinCities/adopt-a-tree,Stackato-Apps/adopt-a-hydrant,codeforamerica/adopt-a-hydrant,codeforanchorage/adopt-a-hydrant,mapmeld/Adopt-a-Siren-Macon,baraka101/dar-adopt-a-mtaro,codeforboston/adopt-a-hydrant,openshift-quickstart/adopt-a-hydrant-openshift-quickstart,0111001101111010/adopt-a-spot-odu,openoakland/adopt-a-drain,eebbesen/adopt-a-tree,Stackato-Apps/adopt-a-hydrant,Bryanprz/adopt-a-street,codeforamerica/adopt-a-hydrant,Bryanprz/adopt-a-street,codeforanchorage/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,jamiekelly/adopt-a-hydrant,OpenTwinCities/adopt-a-tree,codefornigeria/adopt-a-hydrant,codefornigeria/adopt-a-hydrant,openshift-quickstart/adopt-a-hydrant-openshift-quickstart,codefornigeria/adopt-a-hydrant,codeforboston/adopt-a-hydrant,jasnow/adopt-a-hydrant,friendlycode/adopt-a-hydrant,codeforamerica/adopt-a-hydrant,Bryanprz/adopt-a-street,billyfung/van-racks,akintoey/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,voyera/adopt-a-hydrant,voyera/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,eebbesen/adopt-a-tree,CostantinB/adopt-a-hydrant,eebbesen/adopt-a-tree,CostantinB/adopt-a-hydrant,codeforsavannah/adopt-a-garden,CostantinB/adopt-a-hydrant,siruguri/adopt-a-drain,codeforamerica/adopt-a-siren,friendlycode/adopt-a-hydrant,code4sac/adopt-a-light