Thanks for your rating. It's great to hear that you like the add-on. 😀

I currently have no donation platform where you could actually donate anyway, but thanks for your commitment to help.
However, if you are interested, there are things you can do to contribute to this project in various ways (even without coding skills), e.g. by translating the add-on. See https://github.com/rugk/awesome-emoji-picker/blob/master/CONTRIBUTING.md for details.