Implicitly marking parameter $selectedPage as nullable is deprecated

[wadealer]

Message: TelegramBot\InlineKeyboardPagination\InlineKeyboardPagination::getPagination(): Implicitly marking parameter $selectedPage as nullable is deprecated, the explicit nullable type must be used instead

Filename: src/InlineKeyboardPagination.php

Line Number: 203

public function getPagination(int $selectedPage = null): array shoud be changed to public function getPagination(?int $selectedPage = null): array