If it wasn't for my test suite, things would have been a giant mess long ago and I probably would have abandoned it. I can't think of doing a react project without a test suite because over time, any dependencies you have (including on react) will end up breaking things in ways that you don't know. Without those tests, you can't be sure of upgrades... which you're forced to do because your users will want to do things like upgrade react.
So... any project like this... in order for me to ever add it to my own project or depend on it in any way, really needs a test suite.
The test suite for this project is pretty much non-existent, which is a huge bummer should should be a huge red flag for anyone who thinks about using it. You're just going to end up with broken code.