Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/zendframework/zend-feed/composer.json

@@ -0,0 +1,49 @@
+{
+    "name": "zendframework/zend-feed",
+    "description": "provides functionality for consuming RSS and Atom feeds",
+    "license": "BSD-3-Clause",
+    "keywords": [
+        "zf2",
+        "feed"
+    ],
+    "homepage": "https://github.com/zendframework/zend-feed",
+    "autoload": {
+        "psr-4": {
+            "Zend\\Feed\\": "src/"
+        }
+    },
+    "require": {
+        "php": ">=5.5",
+        "zendframework/zend-escaper": "~2.5",
+        "zendframework/zend-stdlib": "~2.5"
+    },
+    "require-dev": {
+        "zendframework/zend-db": "~2.5",
+        "zendframework/zend-cache": "~2.5",
+        "zendframework/zend-http": "~2.5",
+        "zendframework/zend-servicemanager": "~2.5",
+        "zendframework/zend-validator": "~2.5",
+        "fabpot/php-cs-fixer": "1.7.*",
+        "phpunit/PHPUnit": "~4.0"
+    },
+    "suggest": {
+        "zendframework/zend-cache": "Zend\\Cache component",
+        "zendframework/zend-db": "Zend\\Db component",
+        "zendframework/zend-http": "Zend\\Http for PubSubHubbub, and optionally for use with Zend\\Feed\\Reader",
+        "zendframework/zend-servicemanager": "Zend\\ServiceManager component, for default/recommended ExtensionManager implementations",
+        "zendframework/zend-validator": "Zend\\Validator component"
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true,
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.5-dev",
+            "dev-develop": "2.6-dev"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "ZendTest\\Feed\\": "test/"
+        }
+    }
+}