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

plugins/php-imap/vendor/nikic/php-parser/lib/PhpParser/Token.php

@@ -0,0 +1,18 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser;
+
+/**
+ * A PHP token. On PHP 8.0 this extends from PhpToken.
+ */
+class Token extends Internal\TokenPolyfill {
+    /** Get (exclusive) zero-based end position of the token. */
+    public function getEndPos(): int {
+        return $this->pos + \strlen($this->text);
+    }
+
+    /** Get 1-based end line number of the token. */
+    public function getEndLine(): int {
+        return $this->line + \substr_count($this->text, "\n");
+    }
+}