Bump expressive version

Author: weierophinney

composer.json

@@ -14,7 +14,7 @@
     "require": {
         "php": ">=5.5",
         "container-interop/container-interop": "^1.1",
-        "zendframework/zend-expressive": "^0.4",
+        "zendframework/zend-expressive": "^0.5",
         "zendframework/zend-filter": "^2.5",
         "zendframework/zend-servicemanager": "^2.5",
         "zendframework/zend-view": "^2.5"