fixed wrong parsing or oembed tumblr url

Author: oscarotero

src/Url.php

@@ -254,10 +254,10 @@ public function getPath()
     {
         $path = !empty($this->info['path']) ? '/'.implode('/', $this->info['path']).'/' : '/';
 
-        if (!empty($this->info['file'])) {
+        if (isset($this->info['file'])) {
             $path .= $this->info['file'];
 
-            if (!empty($this->info['extension'])) {
+            if (isset($this->info['extension'])) {
                 $path .= '.'.$this->info['extension'];
             }
         }

tests/UrlTest.php

@@ -8,6 +8,7 @@ public function testParser()
             'http://vimeo.com//69912181?' => 'http://vimeo.com/69912181',
             'http://vimeo.com//69912181' => 'http://vimeo.com/69912181',
             'http://vimeo.com/69912181' => 'http://vimeo.com/69912181',
+            'https://www.tumblr.com/oembed/1.0' => 'https://www.tumblr.com/oembed/1.0',
         ];
 
         foreach ($urls as $url => $expected_url) {