upgrade to laravel 7 and set branch to v2

vendor/symfony/routing/Generator/UrlGeneratorInterface.php

@@ -71,10 +71,6 @@ interface UrlGeneratorInterface extends RequestContextAwareInterface
      *
      * The special parameter _fragment will be used as the document fragment suffixed to the final URL.
      *
-     * @param string  $name          The name of the route
-     * @param mixed[] $parameters    An array of parameters
-     * @param int     $referenceType The type of reference to be generated (one of the constants)
-     *
      * @return string The generated URL
      *
      * @throws RouteNotFoundException              If the named route doesn't exist
@@ -82,5 +78,5 @@ interface UrlGeneratorInterface extends RequestContextAwareInterface
      * @throws InvalidParameterException           When a parameter value for a placeholder is not correct because
      *                                             it does not match the requirement
      */
-    public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH);
+    public function generate(string $name, array $parameters = [], int $referenceType = self::ABSOLUTE_PATH);
 }