Looks like their README reflects the fact that anyone who could see the repo could also push to it. You should submit a PR :)
EDIT: I am mistaken. I thought cloning git@ meant you could read/write from it (aka allowed to push). Turns out it's just a public key thing. Comment above me is correct.
EDIT: I am mistaken. I thought cloning git@ meant you could read/write from it (aka allowed to push). Turns out it's just a public key thing. Comment above me is correct.