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

plugins/php-imap/vendor/illuminate/support/HtmlString.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace Illuminate\Support;
+
+use Illuminate\Contracts\Support\Htmlable;
+use Stringable;
+
+class HtmlString implements Htmlable, Stringable
+{
+    /**
+     * The HTML string.
+     *
+     * @var string
+     */
+    protected $html;
+
+    /**
+     * Create a new HTML string instance.
+     *
+     * @param  string  $html
+     * @return void
+     */
+    public function __construct($html = '')
+    {
+        $this->html = $html;
+    }
+
+    /**
+     * Get the HTML string.
+     *
+     * @return string
+     */
+    public function toHtml()
+    {
+        return $this->html;
+    }
+
+    /**
+     * Determine if the given HTML string is empty.
+     *
+     * @return bool
+     */
+    public function isEmpty()
+    {
+        return $this->html === '';
+    }
+
+    /**
+     * Determine if the given HTML string is not empty.
+     *
+     * @return bool
+     */
+    public function isNotEmpty()
+    {
+        return ! $this->isEmpty();
+    }
+
+    /**
+     * Get the HTML string.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->toHtml();
+    }
+}