添加hls.js演示

docs/lab/js/shaka.js

@@ -0,0 +1,11 @@
+var art = new Artplayer({
+    container: '.artplayer-app',
+    url: '//storage.googleapis.com/shaka-demo-assets/angel-one/dash.mpd',
+    customType: {
+        mpd: function(video, url) {
+            shaka.polyfill.installAll();
+            var player = new shaka.Player(video);
+            player.load(url);
+        },
+    },
+});