NAssetNode: compatible with Latte 3.1

Author: dg

src/Bridges/AssetsLatte/Nodes/NAssetNode.php

@@ -14,6 +14,7 @@
 use Latte\Compiler\Nodes\AuxiliaryNode;
 use Latte\Compiler\Nodes\Html\AttributeNode;
 use Latte\Compiler\Nodes\Html\ElementNode;
+use Latte\Compiler\Nodes\Html\ExpressionAttributeNode;
 use Latte\Compiler\Nodes\Php\Expression\ArrayNode;
 use Latte\Compiler\Nodes\Php\ExpressionNode;
 use Latte\Compiler\Nodes\StatementNode;
@@ -89,6 +90,8 @@ public static function findUsedAttributes(ElementNode $el): array
 		foreach ($el->attributes?->children as $child) {
 			if ($child instanceof AttributeNode && $child->name instanceof TextNode) {
 				$res[$child->name->content] = NodeHelpers::toText($child->value) ?? true;
+			} elseif ($child instanceof ExpressionAttributeNode) {
+				$res[$child->name] = true;
 			}
 		}
 		return $res;