add double click to make full screen support

src/js/plyr.js

@@ -2229,6 +2229,9 @@
 
         // Toggle fullscreen
         function _toggleFullscreen(event) {
+            if (plyr.type === 'audio') {
+              return
+            }
             // Check for native support
             var nativeSupport = fullscreen.supportsFullScreen;
 
@@ -3193,6 +3196,9 @@
             // Fullscreen
             _proxyListener(plyr.buttons.fullscreen, 'click', config.listeners.fullscreen, _toggleFullscreen);
 
+            // Toggle fullscreen when user double clicks on video wrapper
+            _proxyListener(plyr.container, 'dblclick', config.listeners.fullscreen, _toggleFullscreen);
+
             // Handle user exiting fullscreen by escaping etc
             if (fullscreen.supportsFullScreen) {
                 _on(document, fullscreen.fullScreenEventName, _toggleFullscreen);