Enums changed to uppercase in generated node files

[TLadd]

What version of protobuf and what language are you using?
Version: v3.5.1
Language: Javascript

What operating system (Linux, Windows, ...) and version?
Mac OS X

What did you do?
Steps to reproduce the behavior:
Example repo here: https:/TLadd/example-grpc-enum.

In the proto file, the enum is specified as

enum Value {
    hello = 0;
    hi = 1;
  }

After running

grpc_tools_node_protoc --js_out=import_style=commonjs,binary:./ --grpc_out=./ --plugin=protoc-gen-grpc=`which grpc_tools_node_protoc_plugin` helloworld.proto

the generated output is capitalized

/**
 * @enum {number}
 */
proto.helloworld.HelloRequest.Value = {
  HELLO: 0,
  HI: 1
};

What did you expect to see
enums maintain their casing in generated files

What did you see instead?
Lowercase enums defined in proto files are capitalized in generated files when using grpc_tools_node_protoc

grpc/grpc-node#404

[TLadd]

I believe this is expected behavior. I was having an issue because the plugin I was using to generate typescript definitions did not match this behavior, but a PR was merged to make it do so.