Streamlabs Charity API handler

[lgallegos39]

So at the moment Streamlabs does not have this listener on their documentation, but the dev for streamlabs informed me in an email that there is an event type for Streamlabs Charity donations called streamlabscharitydonation. I haven't been able to test it myself since I'm not very knowledgeable with Java applications, but I assume this could easily be added if it does work so that the mod can support Charity donations as well through Streamlabs.