Update zend-expressive-router dependency

- To pick up the `RouteResultSubjectInterface`

Author: weierophinney

composer.json

@@ -20,7 +20,7 @@
         "container-interop/container-interop": "^1.1",
         "psr/http-message": "^1.0",
         "zendframework/zend-diactoros": "^1.1",
-        "zendframework/zend-expressive-router": "^1.0",
+        "zendframework/zend-expressive-router": "^1.1",
         "zendframework/zend-expressive-template": "^1.0.1",
         "zendframework/zend-stratigility": "^1.1"
     },