[Suggestion] Play sound on upgrade

[tjesp]

I always keep track on my chat window for potential upgrades. Could you add a sound effect option, like a cheering crowd or similar if an upgrade was found?

[BujuArena]

Thanks for the feature request. I personally have no need for this and no time to add extra features which I won't be using, so I'm sorry to say that I won't be implementing it myself. However, I would be happy to review a pull request with the feature and accept it if it makes the sound feature optional and disabled by default.