Avoid mb_check_encoding deprecation

Appeared with PHP 8.1 when the value null is passed
to mb_check_encoding by accident.

Author: iquito

src/Debug.php

@@ -168,7 +168,7 @@ public static function sanitizeData($data): string
         // All other non-array values are fine
         if (!\is_array($data)) {
             // If parts of the string are not UTF8 we assume it to be a binary string
-            if (!\mb_check_encoding($data, 'UTF-8')) {
+            if (\is_string($data) && !\mb_check_encoding($data, 'UTF-8')) {
                 return '0x' . \bin2hex($data);
             }
 

vendor-bin/phpcs/composer.json

@@ -1,6 +1,6 @@
 {
     "require": {
         "squizlabs/php_codesniffer": "^3.5",
-        "slevomat/coding-standard": "^6.0"
+        "slevomat/coding-standard": "^7.0"
     }
 }

vendor-bin/phpstan/composer.json

@@ -1,5 +1,5 @@
 {
     "require": {
-        "phpstan/phpstan": "^0.12"
+        "phpstan/phpstan": "^1.0"
     }
 }