Update rack-pjax dependency to version 0.5.7
Update rack-pjax dependency to version 0.5.7

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