use Json\decode function

Signed-off-by: Tonko Mulder <[email protected]>

Author: Treggats

src/Tempest/Framework/Testing/Http/TestResponseHelper.php

@@ -13,6 +13,7 @@
 use Tempest\Http\Responses\Invalid;
 use Tempest\Http\Session\Session;
 use Tempest\Http\Status;
+use Tempest\Support\Json;
 use Tempest\Validation\Rule;
 use Tempest\View\View;
 use Tempest\View\ViewRenderer;
@@ -262,7 +263,7 @@ public function assertHasJsonValidationError(string $key, ?Closure $test = null)
 
         $validationErrors = array_map(function ($failingRules) use ($key) {
             try {
-                $errors = json_decode($failingRules, true, 512, JSON_THROW_ON_ERROR);
+                $errors = Json\decode($failingRules);
             } catch (JsonException) {
                 $errors = [];
             }