Enable support for modern Sculpin projects.

Author: simensen

cli/drivers/SculpinValetDriver.php

@@ -11,6 +11,17 @@ class SculpinValetDriver extends BasicValetDriver
      * @return bool
      */
     public function serves($sitePath, $siteName, $uri)
+    {
+        return $this->isModernSculpinProject($sitePath) ||
+            $this->isLegacySculpinProject($sitePath);
+    }
+
+    private function isModernSculpinProject($sitePath)
+    {
+        return is_dir($sitePath.'/source') && is_dir($sitePath.'/output_dev');
+    }
+
+    private function isLegacySculpinProject($sitePath)
     {
         return is_dir($sitePath.'/.sculpin');
     }