Add changelog for #592

Author: geerteltink

CHANGELOG.md

@@ -2,6 +2,32 @@
 
 All notable changes to this project will be documented in this file, in reverse chronological order by release.
 
+## 2.2.1 - TBD
+
+### Added
+
+- Nothing.
+
+### Changed
+
+- Nothing.
+
+### Deprecated
+
+- Nothing.
+
+### Removed
+
+- Nothing.
+
+### Fixed
+
+- [#592](https://github.com/zendframework/zend-expressive/pull/592) fixes
+  a v3 to v2 backwards port issue where the `Router\Middleware\DispatchMiddleware`
+  is registered as an invokable and it should be registered with the
+  `Router\Middleware\DispatchMiddlewareFactory`. This caused a
+  "`DispatchMiddleware` already exists and cannot be overridden" exception.
+
 ## 2.2.0 - 2018-03-12
 
 ### Added
@@ -46,47 +72,47 @@ All notable changes to this project will be documented in this file, in reverse
   - `Zend\Expressive\AppFactory`: if you are using this, you will need to switch
     to direct usage of `Zend\Expressive\Application` or a
     `Zend\Stratigility\MiddlewarePipe` instance.
-  
+
   - `Zend\Expressive\ApplicationConfigInjectionTrait`: if you are using it, it is
     marked internal, and deprecated; it will be removed in version 3.
-  
+
   - `Zend\Expressive\Container\NotFoundDelegateFactory`: the `NotFoundDelegate`
     will be renamed to `Zend\Expressive\Handler\NotFoundHandler` in version 3,
     making this factory obsolete.
-  
+
   - `Zend\Expressive\Delegate\NotFoundDelegate`: this class becomes
     `Zend\Expressive\Handler\NotFoundHandler` in v3, and the new class is added in
     version 2.2 as well.
-  
+
   - `Zend\Expressive\Emitter\EmitterStack`: the emitter concept is extracted from
     zend-diactoros to a new component, zend-httphandlerrunner. This latter
     component is used in version 3, and defines the `EmitterStack` class. Unless
     you are extending it or interacting with it directly, this change should not
     affect you; the `Zend\Diactoros\Response\EmitterInterface` service will be
     directed to the new class in that version.
-  
+
   - `Zend\Expressive\IsCallableInteropMiddlewareTrait`: if you are using it, it is
     marked internal, and deprecated; it will be removed in version 3.
-  
+
   - `Zend\Expressive\MarshalMiddlewareTrait`: if you are using it, it is marked
     internal, and deprecated; it will be removed in version 3.
-  
+
   - `Zend\Expressive\Middleware\DispatchMiddleware`: this functionality has been
     moved to zend-expressive-router, under the `Zend\Expressive\Router\Middleware`
     namespace.
-  
+
   - `Zend\Expressive\Middleware\ImplicitHeadMiddleware`: this functionality has been
     moved to zend-expressive-router, under the `Zend\Expressive\Router\Middleware`
     namespace.
-  
+
   - `Zend\Expressive\Middleware\ImplicitOptionsMiddleware`: this functionality has been
     moved to zend-expressive-router, under the `Zend\Expressive\Router\Middleware`
     namespace.
-  
+
   - `Zend\Expressive\Middleware\NotFoundHandler`: this will be removed in
     version 3, where you can instead pipe `Zend\Expressive\Handler\NotFoundHandler`
     directly instead.
-  
+
   - `Zend\Expressive\Middleware\RouteMiddleware`: this functionality has been
     moved to zend-expressive-router, under the `Zend\Expressive\Router\Middleware`
     namespace.