While the issue opener is quite brisk and curt, they hardly goes as far as overt rudeness. The blank non-response is astoundingly rude and dismissive in contrast.
Give me a break. The project maintainer is volunteering his time to help the javascript community and is doing a fantastic job fixing dozens of bugs and adding new optimizations and features - often the same day as issues are opened. Rather than nag him, step up and review the commits yourself and make a pull request implementing a ChangeLog.