bump to 3.5.4
bump to 3.5.4

localshred/protobuf,brianstien/protobuf,quixoten/protobuf,lookout/protobuffy,ruby-protobuf/protobuf,quixoten/protobuf,lookout/protobuffy,localshred/protobuf,ruby-protobuf/protobuf,brianstien/protobuf