devp2p: add snappy compression to ping/pong (#1442)
devp2p: add snappy compression to ping/pong (#1442)

* devp2p:  add snappy compression to ping/pong

* lint
ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm