I occasionally do small fixes for my game when someone messages me. It's usually a very minor fix and I'd rather not spam people who follow me every time I update for this reason. On the other hand when someone asks me in a message to do a fix and I can deliver easily I like doing it to encourage other bug reports instead of bundling the fix into a later update.

Is it possible for me to upload a new version without notifying all of my followers about it?

I think you can go in your feed and delete a notification, but only after the fact.

I was not aware that every update messaged all of your followers. I shall keep this in mind.