You should educate yourself on how open source works and why respecting OSS licenses matters, as one day your work might be used in a similar way.
And this is unrelated to steemSTEM, I just personally dislike seeing open source developers who worked hard on something getting zero credit in the clones based off their work. I adhere to professional standards and I expect others around me to do the same.
Don't forget to update your package.json too
https://github.com/tngflx/Steem-UltimateEditor/blob/master/package.json#L1-L16