[vendakka]

It isn't just the tone that I'd take issue with. The person who reported the bug is also implying that the library author is either negligent or incompetent. I consider this to be an extremely uncharitable attitude.

The library author is a person who's taken the time to publish their work for free. If one finds issues with the library, the polite thing to do would be to first ask about it instead of complaining. There are likely good reasons for this (and lack of time is a very good reason). A simple "I find you aren't supporting these emojis. Is there a reason for that and can I do anything to help?" goes a long way.