CHANGELOG v3.0.0

Author: rpearce

CHANGELOG.md

@@ -4,6 +4,23 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [3.0.0] - 2019-02-13
+
+### Changed
+* sets a new peer dependency to be at least React 16.8
+* converts component to functional component and uses the [`useCallback`
+  hook](https://reactjs.org/docs/hooks-reference.html#usecallback) for the
+  `handleKeyDown` event memoization
+* wraps the component and forwarded ref higher-order component in
+  [`React.memo`](https://reactjs.org/docs/react-api.html#reactmemo)
+* updates example to use [`useState`](https://reactjs.org/docs/hooks-reference.html#usestate)
+  and [`useCallback`](https://reactjs.org/docs/hooks-reference.html#usecallback)
+  to toggle the button states (text and background color, where applicable)
+* rewrites the tests in
+  [`react-testing-library`](https://github.com/kentcdodds/react-testing-library)
+  to focus less on internals and more on what an end-user might see (and really
+  to try it out, too)
+
 ## [2.0.0] - 2018-12-29
 
 ### Changed