Update changelog for release

Author: taion

CHANGES.md

@@ -1,14 +1,16 @@
-## [HEAD] \(v2.4.0\)
-> Unreleased
+## [v2.4.0]
+> April 28, 2016
 
 - **Feature:** Add `withRouter` higher-order component for injecting `props.router` ([#3352])
 - **Minor:** Add React as a peer dependency ([#3361])
 - **Minor:** Upgrade to Babel 6 ([#3362])
+- **Minor:** Add `target` to `propTypes` for `<Link>` ([#3397])
 
-[HEAD]: https://github.com/reactjs/react-router/compare/latest...HEAD
-[#3352]: https://github.com/reactjs/react-router/issues/3352
-[#3361]: https://github.com/reactjs/react-router/issues/3361
-[#3362]: https://github.com/reactjs/react-router/issues/3362
+[v2.4.0]: https://github.com/reactjs/react-router/compare/v2.3.0...v2.4.0
+[#3352]: https://github.com/reactjs/react-router/pull/3352
+[#3361]: https://github.com/reactjs/react-router/pull/3361
+[#3362]: https://github.com/reactjs/react-router/pull/3362
+[#3397]: https://github.com/reactjs/react-router/pull/3397
 
 
 ## [v2.3.0]
@@ -19,9 +21,9 @@
 - **Minor:** Move ES module build back to `es6/` to avoid breaking people who were incorrectly importing from `react-router/es6` ([#3334])
 
 [v2.3.0]: https://github.com/reactjs/react-router/compare/v2.2.4...v2.3.0
-[#3327]: https://github.com/reactjs/react-router/issues/3327
-[#3334]: https://github.com/reactjs/react-router/issues/3334
-[#3349]: https://github.com/reactjs/react-router/issues/3349
+[#3327]: https://github.com/reactjs/react-router/pull/3327
+[#3334]: https://github.com/reactjs/react-router/pull/3334
+[#3349]: https://github.com/reactjs/react-router/pull/3349
 
 
 ## [v2.2.4]