I've just published a new version of the moment node.
It has jumped to v5 because the minimum versions of node.js and Node-RED have changed. node.js v14 and node-red v3 are now the minimum versions.
Not much change in the node other than updating the libraries.
Please note that very few changes will be made to this node in the future since moment.js is now baked into JSONata and therefore available via change, function and other nodes. However, if someone wanted to make a contribution to it, I'd be more than happy to look at that. Unfortunately, I don't currently have time to work on it.