Like he iterates in the blog post multiple times: It's still MIT licensed, you can fork it to your heart's content. Or keep using the mainline and merge new features to your own fork.
For me the reason to add dependencies to my projects is exactly because they are maintained upstream and I don't need to worry about maintaining them myself. If I need to fork and maintain it myself I'd rather write my own version of it that perfectly fits my use case, or use another dependency that is maintained.