Left trim the path separator in order to get `\League\Flysystem\Util\…

…ContentListingFormatter::isDirectChild` return true and get the listing of the root folder of a share.

fixes #2

src/SmbAdapter.php

@@ -383,7 +383,7 @@ protected function normalizeFileInfo(IFileInfo $file)
     {
         $normalized = [
             'type' => $file->isDirectory() ? 'dir' : 'file',
-            'path' => $this->getFilePath($file),
+            'path' => ltrim($this->getFilePath($file), $this->pathSeparator),
             'timestamp' => $file->getMTime()
         ];