feat: update array_is_list usage and add Symfony polyfill for PHP 8.1

Author: Benoit POLASZEK

composer.json

@@ -22,14 +22,14 @@
         "php": "^7.4 || ^8.0",
         "ext-json": "*",
         "php-http/discovery": "^1.7",
-        "psr/http-client": "^1.0"
+        "psr/http-client": "^1.0",
+        "symfony/polyfill-php81": "^1.33"
     },
     "autoload": {
         "psr-4": {
             "MeiliSearch\\": "src/",
             "Meilisearch\\": "src/"
-        },
-        "files": ["src/polyfills.php"]
+        }
     },
     "autoload-dev": {
         "psr-4": {

src/Http/Client.php

@@ -165,7 +165,7 @@ private function buildQueryString(array $queryParams = []): string
             if (\is_bool($value)) {
                 $queryParams[$key] = $value ? 'true' : 'false';
             }
-            if (\is_array($value) && array_is_list($value)) {
+            if (\is_array($value) && \array_is_list($value)) {
                 $queryParams[$key] = implode(',', $value);
             }
         }