Proposal: Ability to configure msgpack encoding, e.g. to ignore undefined properties

[max-brewer]

Hi 👋

Would it be helpful to anyone else if it were possible to configure the msgpack encoder.

For example msgpack has the option to ignoreUndefinedProperties, which is desirable in certain circumstances, eg. to reduce bandwidth or storage requirements.

Msgpack options could (for example) be provided with the client configuration. Something like:

const client = new FluentClient('tag', {
  msgpackOptions: {
    maxDepth: 42,
    ingnoreUndefined: true,
    // other msgpack options at https://github.com/msgpack/msgpack-javascript/blob/main/src/Encoder.ts#L15
  }
}

Would be happy to throw something together if it's interesting.

Thanks in advance

[jamiees2]

Hey! I think it would be interesting to know under which circumstances this would be useful. The library is mainly meant to communicate with fluentd / fluent bit, and I'm unsure that changing these parameters has much value, when the upstream still needs to understand what gets encoded. That said, this could maybe be useful for custom FluentServer implementations, but having that context would be helpful :)

Happy to review a PR if you have the time!