fix: Close playlist streams correctly

tests/PlaylistArchiveStreamTest.php

@@ -34,6 +34,16 @@ class PlaylistArchiveStreamTest extends TestCase
         $this->stream = new PlaylistArchiveStream(Config::getInstance('config/'.$configFile));
     }
 
+    /**
+     * Clean variables used in tests.
+     *
+     * @return void
+     */
+    protected function tearDown()
+    {
+        $this->stream->stream_close();
+    }
+
     /**
      * Test the stream_open() function.
      *