Metadata not sending to server on NakamaSocket#join_match_async

[nnwbot]

Given an existing match ID, using NakamaSocket#join_match_async wasn't passing along the suppled metadata.

I got it working on my local machine with a quick edit; can supply a PR if needed.

nakama-godot/addons/com.heroiclabs.nakama/socket/NakamaSocket.gd

Line 317 in da61830

msg.match_id = p_match_id

just needs to attach the suppled metadata to the message: msg.metadata = p_metadata

[novabyte]

@newnoiseworks Thanks for the bug report. I fixed it quickly on master. Pull requests are always welcome though 🙏