laravel-6 support

vendor/symfony/css-selector/Parser/ParserInterface.php

@@ -28,9 +28,7 @@ interface ParserInterface
     /**
      * Parses given selector source into an array of tokens.
      *
-     * @param string $source
-     *
      * @return SelectorNode[]
      */
-    public function parse($source);
+    public function parse(string $source): array;
 }