Merge branch 'develop' into a11y-improvements

# Conflicts:
#	demo/dist/demo.css
#	dist/plyr.css
#	dist/plyr.js.map
#	dist/plyr.min.js
#	dist/plyr.min.js.map
#	dist/plyr.polyfilled.js
#	dist/plyr.polyfilled.js.map
#	dist/plyr.polyfilled.min.js
#	dist/plyr.polyfilled.min.js.map
#	src/js/captions.js
#	src/js/plyr.js

src/js/defaults.js

@@ -60,7 +60,7 @@ const defaults = {
     // Sprite (for icons)
     loadSprite: true,
     iconPrefix: 'plyr',
-    iconUrl: 'https://cdn.plyr.io/3.3.8/plyr.svg',
+    iconUrl: 'https://cdn.plyr.io/3.3.10/plyr.svg',
 
     // Blank video (used to prevent errors on source change)
     blankVideo: 'https://cdn.plyr.io/static/blank.mp4',
@@ -119,7 +119,10 @@ const defaults = {
     // Captions settings
     captions: {
         active: false,
-        language: (navigator.language || navigator.userLanguage).split('-')[0],
+        language: 'auto',
+        // Listen to new tracks added after Plyr is initialized.
+        // This is needed for streaming captions, but may result in unselectable options
+        update: false,
     },
 
     // Fullscreen settings
@@ -191,6 +194,14 @@ const defaults = {
         disabled: 'Disabled',
         enabled: 'Enabled',
         advertisement: 'Ad',
+        qualityBadge: {
+            2160: '4K',
+            1440: 'HD',
+            1080: 'HD',
+            720: 'HD',
+            576: 'SD',
+            480: 'SD',
+        },
     },
 
     // URLs
@@ -315,9 +326,8 @@ const defaults = {
         display: {
             currentTime: '.plyr__time--current',
             duration: '.plyr__time--duration',
-            buffer: '.plyr__progress--buffer',
-            played: '.plyr__progress--played',
-            loop: '.plyr__progress--loop',
+            buffer: '.plyr__progress__buffer',
+            loop: '.plyr__progress__loop', // Used later
             volume: '.plyr__volume--display',
         },
         progress: '.plyr__progress',