simplify default error result

Author: shmax

src/Type/ErrorType/ValidationErrorType.php

@@ -141,7 +141,7 @@ public static function create(array $config, array $path = []): self
      */
     public function validate(array $field, $value, array $settings): array
     {
-        return [0];
+        return [];
     }
 
     /**

tests/Validation/ValidationErrorTest.php

@@ -15,7 +15,7 @@ public function testNullableScalarValidationOnNullValueSuccess(): void
         $validationError = TypeRegistry::validationError();
         $res = $validationError->validate(['type' => Type::id()], null, ['type' => Type::id(), 'args' => []]);
 
-        static::assertEquals($res[0], 0);
+        static::assertEquals($res, []);
 
     }
 }