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

vendor/sebastian/version/.gitattributes

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+*.php diff=php

vendor/sebastian/version/.gitignore

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+/.idea

vendor/sebastian/version/LICENSE

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+Version
+
+Copyright (c) 2013-2015, Sebastian Bergmann <sebastian@phpunit.de>.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+ * Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in
+   the documentation and/or other materials provided with the
+   distribution.
+
+ * Neither the name of Sebastian Bergmann nor the names of his
+   contributors may be used to endorse or promote products derived
+   from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.

vendor/sebastian/version/README.md

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+# Version
+
+**Version** is a library that helps with managing the version number of Git-hosted PHP projects.
+
+## Installation
+
+Simply add a dependency on `sebastian/version` to your project's `composer.json` file if you use [Composer](http://getcomposer.org/) to manage the dependencies of your project.
+
+## Usage
+
+The constructor of the `SebastianBergmann\Version` class expects two parameters:
+
+* `$release` is the version number of the latest release (`X.Y.Z`, for instance) or the name of the release series (`X.Y`) when no release has been made from that branch / for that release series yet.
+* `$path` is the path to the directory (or a subdirectory thereof) where the sourcecode of the project can be found. Simply passing `__DIR__` here usually suffices.
+
+Apart from the constructor, the `SebastianBergmann\Version` class has a single public method: `getVersion()`.
+
+Here is a contrived example that shows the basic usage:
+
+    <?php
+    $version = new SebastianBergmann\Version(
+      '3.7.10', '/usr/local/src/phpunit'
+    );
+
+    var_dump($version->getVersion());
+    ?>
+
+    string(18) "3.7.10-17-g00f3408"
+
+When a new release is prepared, the string that is passed to the constructor as the first argument needs to be updated.
+
+### How SebastianBergmann\Version::getVersion() works
+
+* If `$path` is not (part of) a Git repository and `$release` is in `X.Y.Z` format then `$release` is returned as-is.
+* If `$path` is not (part of) a Git repository and `$release` is in `X.Y` format then `$release` is returned suffixed with `-dev`.
+* If `$path` is (part of) a Git repository and `$release` is in `X.Y.Z` format then the output of `git describe --tags` is returned as-is.
+* If `$path` is (part of) a Git repository and `$release` is in `X.Y` format then a string is returned that begins with `X.Y` and ends with information from `git describe --tags`.

vendor/sebastian/version/composer.json

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+{
+    "name": "sebastian/version",
+    "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+    "homepage": "https://github.com/sebastianbergmann/version",
+    "license": "BSD-3-Clause",
+    "authors": [
+        {
+            "name": "Sebastian Bergmann",
+            "email": "sebastian@phpunit.de",
+            "role": "lead"
+        }
+    ],
+    "support": {
+        "issues": "https://github.com/sebastianbergmann/version/issues"
+    },
+    "autoload": {
+        "classmap": [
+            "src/"
+        ]
+    }
+}

vendor/sebastian/version/src/Version.php

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+<?php
+/*
+ * This file is part of the Version package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann;
+
+/**
+ * @since Class available since Release 1.0.0
+ */
+class Version
+{
+    private $path;
+    private $release;
+    private $version;
+
+    /**
+     * @param string $release
+     * @param string $path
+     */
+    public function __construct($release, $path)
+    {
+        $this->release = $release;
+        $this->path    = $path;
+    }
+
+    /**
+     * @return string
+     */
+    public function getVersion()
+    {
+        if ($this->version === null) {
+            if (count(explode('.', $this->release)) == 3) {
+                $this->version = $this->release;
+            } else {
+                $this->version = $this->release . '-dev';
+            }
+
+            $git = $this->getGitInformation($this->path);
+
+            if ($git) {
+                if (count(explode('.', $this->release)) == 3) {
+                    $this->version = $git;
+                } else {
+                    $git = explode('-', $git);
+
+                    $this->version = $this->release . '-' . end($git);
+                }
+            }
+        }
+
+        return $this->version;
+    }
+
+    /**
+     * @param  string      $path
+     * @return bool|string
+     */
+    private function getGitInformation($path)
+    {
+        if (!is_dir($path . DIRECTORY_SEPARATOR . '.git')) {
+            return false;
+        }
+
+        $dir = getcwd();
+        chdir($path);
+        $returnCode = 1;
+        $result     = @exec('git describe --tags 2>&1', $output, $returnCode);
+        chdir($dir);
+
+        if ($returnCode !== 0) {
+            return false;
+        }
+
+        return $result;
+    }
+}