remove autoPlayback from mobile demo

docs/mobile.html

@@ -62,7 +62,6 @@
             fullscreen: true,
             fullscreenWeb: true,
             miniProgressBar: true,
-            autoPlayback: true,
             autoOrientation: true,
             moreVideoAttr: {
                 'x5-video-player-type': 'h5',

packages/artplayer/package.json

@@ -1,6 +1,6 @@
 {
     "name": "artplayer",
-    "version": "4.3.8",
+    "version": "4.3.9",
     "expose": "Artplayer",
     "description": "ArtPlayer.js is a modern and full featured HTML5 video player",
     "main": "dist/artplayer.js",