Fix when max() fails if array is empty. (#185)

Author: briedis

src/Extractors/VueJs.php

@@ -141,6 +141,10 @@ private static function getTemplateAttributeFakeJs(array $options, DOMElement $d
     {
         $expressionsByLine = self::getVueAttributeExpressions($options['attributePrefixes'], $dom);
 
+        if (empty($expressionsByLine)) {
+            return '';
+        }
+
         $maxLines = max(array_keys($expressionsByLine));
         $fakeJs = '';