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

vendor/composer/semver/src/Constraint/ConstraintInterface.php

@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of composer/semver.
+ *
+ * (c) Composer <https://github.com/composer>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Composer\Semver\Constraint;
+
+interface ConstraintInterface
+{
+    /**
+     * @param ConstraintInterface $provider
+     *
+     * @return bool
+     */
+    public function matches(ConstraintInterface $provider);
+
+    /**
+     * @param string $prettyString
+     */
+    public function setPrettyString($prettyString);
+
+    /**
+     * @return string
+     */
+    public function getPrettyString();
+
+    /**
+     * @return string
+     */
+    public function __toString();
+}