More docs, event renamed

src/js/defaults.js

@@ -203,7 +203,7 @@ const defaults = {
         'exitfullscreen',
         'captionsenabled',
         'captionsdisabled',
-        'captionchange',
+        'languagechange',
         'controlshidden',
         'controlsshown',
         'ready',

src/js/listeners.js

@@ -314,7 +314,7 @@ const listeners = {
         });
 
         // Caption language change
-        utils.on(this.media, 'captionchange', () => {
+        utils.on(this.media, 'languagechange', () => {
             // Save to storage
             storage.set.call(this, { language: this.language });
         });

src/js/plyr.js

@@ -680,7 +680,7 @@ class Plyr {
         this.captions.language = language;
 
         // Trigger an event
-        utils.dispatchEvent.call(this, this.media, 'captionchange');
+        utils.dispatchEvent.call(this, this.media, 'languagechange');
 
         // Clear caption
         captions.set.call(this);