Version: 3.1.4
PHP 8.0.0
Bug Description
Calling Strings::pcre('preg_replace', ['#\\.#', NULL, '70', -1]) fails with Fatal error: Uncaught TypeError: preg_replace(): Argument #2 ($replacement) must be of type array|string, null given
It happens when using symplify/easy-coding-standard, but it looks rather like error with PHP 8.0 compatibility in nette/utils.
