Added MiddlewarePipeInterface as abstraction layer for MiddlewarePipe

src/MiddlewarePipe.php

@@ -28,7 +28,7 @@
  *
  * @see https://github.com/sencha/connect
  */
-final class MiddlewarePipe implements MiddlewareInterface, RequestHandlerInterface
+final class MiddlewarePipe implements MiddlewarePipeInterface
 {
     /**
      * @var SplQueue

src/MiddlewarePipeInterface.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ * @see       https://github.com/zendframework/zend-stratigility for the canonical source repository
+ * @copyright Copyright (c) 2018 Zend Technologies USA Inc. (https://www.zend.com)
+ * @license   https://github.com/zendframework/zend-stratigility/blob/master/LICENSE.md New BSD License
+ */
+declare(strict_types=1);
+
+namespace Zend\Stratigility;
+
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+interface MiddlewarePipeInterface extends MiddlewareInterface, RequestHandlerInterface
+{
+    public function pipe(MiddlewareInterface $middleware) : void;
+}