Rework to be compatible with PHP 7.*

src/helpers.php

@@ -2,11 +2,11 @@
 
 if (!function_exists('curlRequest')) {
     function curlRequest(
-        string $url,
-        string $method = 'GET',
-        array $queryParams = [],
-        array $headers = [],
-        array|string|null $body = null
+        $url,
+        $method = 'GET',
+        $queryParams = [],
+        $headers = [],
+        $body = null
     ): array {
         $curl = curl_init();