Update player.js

Fixes audio mode duration doubled in iPhone iOS browsers. The player will stop after reaching the real duration. 
iOS() checks both iOS and iPadOS. 
Only tested on iPhone iOS browsers. Testers needed for behavior of iPadOS and MacOS.

assets/js/player.js

@@ -547,3 +547,27 @@ window.addEventListener('keydown', e => {
 if (player.share) {
     player.share(shareOptions);
 }
+
+//iOS audio double duration fix
+player.on('loadedmetadata', function () {
+    if (iOS() && video_data.params.listen) {
+        player.on('timeupdate', function () {
+            if (player.remainingTime() < player.duration() / 2) {
+                player.currentTime(player.duration() + 1);
+            }
+        })
+    }
+});
+		
+function iOS() {
+  return [
+    'iPad Simulator',
+    'iPhone Simulator',
+    'iPod Simulator',
+    'iPad',
+    'iPhone',
+    'iPod'
+  ].includes(navigator.platform)
+  // iPad on iOS 13 detection
+  || (navigator.userAgent.includes("Mac") && "ontouchend" in document)
+}