Merge pull request #32 from imjcw/bugfix/issues-31

Fixed typo #31

src/Client.php

@@ -234,7 +234,7 @@ public function upload(string $uri, array $files = [], array $form = [], array $
  $multipart = [];
 
  foreach ($files as $name => $contents) {
- $contents = \is_resource($contents) ?: \fopen($contents, 'r');
+ $contents = \is_resource($contents) ? $contents : \fopen($contents, 'r');
  $multipart[] = \compact('name', 'contents');
  }