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

plugins/php-imap/vendor/phpunit/php-code-coverage/src/StaticAnalysis/CacheWarmer.php

@@ -0,0 +1,32 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of phpunit/php-code-coverage.
+ *
+ * (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\CodeCoverage\StaticAnalysis;
+
+use SebastianBergmann\CodeCoverage\Filter;
+
+final class CacheWarmer
+{
+    public function warmCache(string $cacheDirectory, bool $useAnnotationsForIgnoringCode, bool $ignoreDeprecatedCode, Filter $filter): void
+    {
+        $analyser = new CachingFileAnalyser(
+            $cacheDirectory,
+            new ParsingFileAnalyser(
+                $useAnnotationsForIgnoringCode,
+                $ignoreDeprecatedCode
+            ),
+            $useAnnotationsForIgnoringCode,
+            $ignoreDeprecatedCode,
+        );
+
+        foreach ($filter->files() as $file) {
+            $analyser->process($file);
+        }
+    }
+}