Add a blog post about hooks

Author: alexkrolick

website/blog/2019-02-06-react-hooks.md

@@ -0,0 +1,16 @@
+---
+title: React Hooks Are Supported
+author: Alex Krolick
+authorURL: http://github.com/alexkrolick
+---
+
+[Hooks have been released in React 16.8](https://reactjs.org/blog/2019/02/06/react-v16.8.0.html#testing-hooks)
+and they are supported out of the box by `react-testing-library`!
+
+Because `react-testing-library` only uses the external interface of your React
+components, hooks work right away! If you rewrite a class component with hooks
+your tests should still pass.
+
+For unit testing custom hooks, we've also added a `testHook` utility. Check out
+the [docs for `testHook`](/docs/react-testing-library/api#testhook). Thanks to
+[@donavon](https://github.com/donavon) for the PR.