Update stubs

Author: phpstan-bot

Diff for: stubs/ext/imap/imap_delete.php

@@ -3,6 +3,6 @@
 /**
  * @param resource $imap
  */
-function imap_delete($imap, string $message_num, int $flags = 0) : bool
+function imap_delete($imap, string $message_nums, int $flags = 0) : bool
 {
 }

Diff for: stubs/ext/imap/imap_undelete.php

@@ -3,6 +3,6 @@
 /**
  * @param resource $imap
  */
-function imap_undelete($imap, string $message_num, int $flags = 0) : bool
+function imap_undelete($imap, string $message_nums, int $flags = 0) : bool
 {
 }