Create factory method for com.julienviet.reactivex.pgclient.Tuple that takes varargs or a Collection

[jklingsporn]

Hi,
I was using a statement like this Tuple tuple = Tuple.of(bindValues.toArray()); (with bindValues being an ArrayList) which works fine for the non-rx version. When switching to rxified version of Tuple my code fails in that regard, that Tuple now consists of 1 entry (which is an array) instead of n entries.
I'm doing this workaround for now:

Tuple tuple = Tuple.tuple();
bindValues.forEach(tuple::addValue);

[vietj]

I think it's because in vertx we need to imrpove the codegen support which is expected in 3.6