fix event.composedPath

packages/artplayer/src/events/clickInit.js

@@ -1,7 +1,7 @@
 export default function clickInit(art, events) {
     const { $player } = art.template;
     events.proxy(document, ['click', 'contextmenu'], event => {
-        if (event.composedPath().indexOf($player) > -1) {
+        if (event.composedPath && event.composedPath().indexOf($player) > -1) {
             art.isFocus = true;
             art.emit('focus');
         } else {