Add upstream plugins

Signed-off-by: Adrian Nöthlich <git@promasu.tech>

wp-content/plugins/all-in-one-event-calendar/lib/date/exception/date.php

@@ -0,0 +1,12 @@
+<?php
+
+/**
+ * Base exception for all date/time operation failures.
+ *
+ * @author     Time.ly Network, Inc.
+ * @since      2.0
+ * @package    Ai1EC
+ * @subpackage Ai1EC.Date.exception
+ */
+class Ai1ec_Date_Exception extends Ai1ec_Exception {
+}