Based on https://github.com/zendframework/zend-expressive-router/releases/tag/1.1.0 (commit 3a641ce2c5acdb1d6a5df077ac8543b4adbc4682 in this repo)

Added
-----

- [zendframework/zend-expressive-router#4](https://github.com/zendframework/zend-expressive-router/pull/4) adds
  `RouteResultSubjectInterface`, a complement to `RouteResultObserverInterface`,
  defining the following methods:
  - `attachRouteResultObserver(RouteResultObserverInterface $observer)`
  - `detachRouteResultObserver(RouteResultObserverInterface $observer)`
  - `notifyRouteResultObservers(RouteResult $result)`

Deprecated
----------

- Nothing.

Removed
-------

- [zendframework/zend-expressive-router#4](https://github.com/zendframework/zend-expressive-router/pull/4) removes
  the deprecation notice from `RouteResultObserverInterface`.

Fixed
-----

- Nothing.