Node-red-node-twitter retweet support

Hi, the node-red-node-twitter is not supporting retweets, since it uses /statuses/update.json, and the retweet is done by statuses/retweet/:id.

I want to create a PR to add this support. I think since it is a different interface- it needs only the tweet id to retweet it, I will create a new node for it.

Or maybe the preferred way is to implement it inside the Twitter Out node?