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

plugins/php-imap/vendor/nesbot/carbon/bin/carbon

@@ -0,0 +1,23 @@
+#!/usr/bin/env php
+<?php
+
+use Carbon\Cli\Invoker;
+
+$dir = __DIR__.'/..';
+
+if (!file_exists($dir.'/autoload.php')) {
+    $dir = __DIR__.'/../vendor';
+}
+
+if (!file_exists($dir.'/autoload.php')) {
+    $dir = __DIR__.'/../../..';
+}
+
+if (!file_exists($dir.'/autoload.php')) {
+    echo 'Autoload not found.';
+    exit(1);
+}
+
+require $dir.'/autoload.php';
+
+exit((new Invoker())(...$argv) ? 0 : 1);

plugins/php-imap/vendor/nesbot/carbon/bin/carbon.bat

@@ -0,0 +1,4 @@
+@ECHO OFF
+setlocal DISABLEDELAYEDEXPANSION
+SET BIN_TARGET=%~dp0/carbon
+php "%BIN_TARGET%" %*