Update deps in advance of code.google.com shutdown
Update deps in advance of code.google.com shutdown

elazarl/goproxy2,brainm/goproxy,elazarl/goproxy2,brainm/goproxy,taliesins/goproxy,elazarl/goproxy,taliesins/goproxy,taliesins/goproxy,selslack/goproxy,shuyaoyimei/goproxy,elazarl/goproxy,kofj/goproxy,coderhaoxin/goproxy,kofj/goproxy,coderhaoxin/goproxy,coderhaoxin/goproxy,brainm/goproxy,selslack/goproxy,shuyaoyimei/goproxy,shuyaoyimei/goproxy,kofj/goproxy,selslack/goproxy,elazarl/goproxy,elazarl/goproxy2