fix: hostname corruption of PSL data

Use multibite strtolower();

Author: dlindberg

Diff for: src/Converter.php

@@ -104,7 +104,7 @@ private function addRule(array $list, array $rule_parts): array
         // "The domain and all rules must be canonicalized in the normal way
         // for hostnames - lower-case, Punycode (RFC 3492)."
 
-        $part = $this->idnToAscii(strtolower($part));
+        $part = $this->idnToAscii(mb_strtolower($part));
         $isDomain = true;
         if (0 === strpos($part, '!')) {
             $part = substr($part, 1);

Diff for: src/IDNAConverterTrait.php

@@ -133,7 +133,7 @@ private function setDomain(string $domain = null): array
             throw new Exception(sprintf('The domain `%s` is invalid: this is an IPv4 host', $domain));
         }
 
-        $formatted_domain = strtolower(rawurldecode($domain));
+        $formatted_domain = mb_strtolower(rawurldecode($domain));
 
         // Note that unreserved is purposely missing . as it is used to separate labels.
         static $domain_name = '/(?(DEFINE)

Diff for: src/Manager.php

@@ -86,7 +86,7 @@ private function getCacheKey(string $str): string
     {
         static $cacheKeyPrefix = 'PSL_FULL';
 
-        return $cacheKeyPrefix.'_'.md5(strtolower($str));
+        return $cacheKeyPrefix.'_'.md5(mb_strtolower($str));
     }
 
     /**