fix: use new org all-contributors (and fix build badge)

README.md

@@ -126,7 +126,7 @@ We are also [looking for maintainers](https://github.com/all-contributors/all-co
 
 [chat-badge]: https://img.shields.io/badge/slack-join-ff69b4.svg?style=flat-square
 [chat]: https://join.slack.com/t/all-contributors/shared_invite/enQtNTE3ODMyMTA4NTk0LTUwZDMxZGZkMmViMzYzYzk2YTM2NjRkZGM5Yzc0ZTc5NmYzNWY3Y2Q0ZTY3ZmFhZDgyY2E3ZmIzNWQwMTUxZmE
-[build-badge]: https://img.shields.io/circleci/all-contributors/all-contributors/master.svg?style=flat-square
+[build-badge]: https://img.shields.io/circleci/project/all-contributors/all-contributors/master.svg?style=flat-square
 [build]: https://circleci.com/gh/all-contributors/all-contributors
 [version-badge]: https://img.shields.io/npm/v/all-contributors.svg?style=flat-square
 [package]: https://www.npmjs.com/package/all-contributors