Release v3.1.18 (#6679)

Co-authored-by: limingxinleo <limingxinleo@users.noreply.github.com>
Co-authored-by: Weslen Teche <weslen_teche@hotmail.com>
Co-authored-by: zds <49744633+zds-s@users.noreply.github.com>
Co-authored-by: szutoutou <szutoutou@qq.com>

src/Query/Builder.php

@@ -1972,7 +1972,7 @@ public function simplePaginate($perPage = 15, $columns = ['*'], $pageName = 'pag
      * @param int $perPage
      * @param string[] $columns
      * @param string $pageName
-     * @param null $page
+     * @param null|int $page
      */
     public function paginate($perPage = 15, $columns = ['*'], $pageName = 'page', $page = null): LengthAwarePaginatorInterface
     {