Updating server dependancies. (#7538)

vendor/github.com/golang/protobuf/protoc-gen-go/plugin/plugin.proto

@@ -91,6 +91,7 @@ message CodeGeneratorRequest {
 
   // The version number of protocol compiler.
   optional Version compiler_version = 3;
+
 }
 
 // The plugin writes an encoded CodeGeneratorResponse to stdout.