Remove the vendor directory in .gitignore as these dependencies are needed for php-imap

plugins/php-imap/vendor/phar-io/manifest/src/values/Extension.php

@@ -0,0 +1,47 @@
+<?php declare(strict_types = 1);
+/*
+ * This file is part of PharIo\Manifest.
+ *
+ * Copyright (c) Arne Blankerts <arne@blankerts.de>, Sebastian Heuer <sebastian@phpeople.de>, Sebastian Bergmann <sebastian@phpunit.de> and contributors
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ */
+namespace PharIo\Manifest;
+
+use PharIo\Version\Version;
+use PharIo\Version\VersionConstraint;
+
+class Extension extends Type {
+    /** @var ApplicationName */
+    private $application;
+
+    /** @var VersionConstraint */
+    private $versionConstraint;
+
+    public function __construct(ApplicationName $application, VersionConstraint $versionConstraint) {
+        $this->application       = $application;
+        $this->versionConstraint = $versionConstraint;
+    }
+
+    public function getApplicationName(): ApplicationName {
+        return $this->application;
+    }
+
+    public function getVersionConstraint(): VersionConstraint {
+        return $this->versionConstraint;
+    }
+
+    public function isExtension(): bool {
+        return true;
+    }
+
+    public function isExtensionFor(ApplicationName $name): bool {
+        return $this->application->isEqual($name);
+    }
+
+    public function isCompatibleWith(ApplicationName $name, Version $version): bool {
+        return $this->isExtensionFor($name) && $this->versionConstraint->complies($version);
+    }
+}