The tool, as is, works for me and my friends. I don't intend to make any major changes to this tool except for occasional bug fixes, so the number of commits is going to be less in future.
I know there are a few outstanding bugs. I have a full-time job and I am contributing to a few other open source projects too, so I don't have a lot of spare time to investigate and fix these issues right now but I may get to it later.
If there are others who might want to help the project by investigating the bugs and/or fixing them, they are very welcome. For any fixes merged to the project, I will be grateful to the contributors and as a token of gratitude, I will mention their names in the README and thank them.
Your claim doesn't match your intent really. Some of your repos have long(many months) old issues with zero interaction from you yet I see activity in commit history.
For small projects like yours, there might be first-time contributors who look up to an author. If you don't interact, they'll get demotivated. If you don't want to interact, leave a comment on your README that "hey am super busy, send a PR with proper tests and may be I'll look when am free, no promises!". :) A little kindness goes a long way.