Thanks for the space and looking forward to all this collaboration has to offer in the future!
SpriteClub does a batch update about once a year (the next one isn't far off), but what actually gets updated depends a lot on what people submit for updating, as going through everything previously submitted ourselves isn't feasible given the roster size. I can try to do a pass for your characters myself once the next update rolls along, but the best way to ensure that something gets updated is to simply submit them yourself.