PHP 8.1 parse_str() warning

[ilianiv]

Warning:
parse_str(): Passing null to parameter No1 ($string) of type string is deprecated

File:
.../vendor/snowplow/referer-parser/php/src/Snowplow/RefererParser/Parser.php:53

public function parse($refererUrl, $pageUrl = null)
    {
        $refererParts = static::parseUrl($refererUrl);
        if (!$refererParts) {
            return Referer::createInvalid();
        }

        $pageUrlParts = static::parseUrl($pageUrl);

        if ($pageUrlParts
            && $pageUrlParts['host'] === $refererParts['host']
            || in_array($refererParts['host'], $this->internalHosts)) {
            return Referer::createInternal();
        }

        $referer = $this->lookup($refererParts['host'], $refererParts['path']);

        if (!$referer) {
            return Referer::createUnknown();
        }

        $searchTerm = null;
        if ($referer['parameters']) {
            parse_str($refererParts['query'], $queryParts);
                      ^^^
            foreach ($referer['parameters'] as $parameter) {
                $searchTerm = isset($queryParts[$parameter]) ? $queryParts[$parameter] : $searchTerm;
            }
        }

        return Referer::createKnown($referer['medium'], $referer['source'], $searchTerm);
    }

[TheMY3]

Can somebody update source code or approve PR if I create it?