fix fullscreenEnabled bug

packages/artplayer/src/player/fullscreenMix.js

@@ -35,12 +35,10 @@ export default function fullscreenMix(art, player) {
             if (player.fullscreenWebState) {
                 player.fullscreenWebExit();
             }
-            $player.classList.add('artplayer-fullscreen');
             screenfull.request($player);
-            if (player.fullscreenState) {
-                player.aspectRatioReset();
-                art.emit('fullscreen:enabled');
-            }
+            $player.classList.add('artplayer-fullscreen');
+            player.aspectRatioReset();
+            art.emit('fullscreen:enabled');
         },
     });