Replace videojs.extends with videojs.extend

"extends" is disallowed in IE8 so videojs renamed the inheritance helper. Update our usage to match.

@@ -44,11 +44,11 @@
     "karma-sauce-launcher": "~0.1.8",
     "qunitjs": "^1.18.0",
     "sinon": "1.10.2",
-    "video.js": "^5.0.0-rc.51"
+    "video.js": "^5.0.0-rc.96"
   },
   "dependencies": {
     "pkcs7": "^0.2.2",
     "videojs-contrib-media-sources": "videojs/videojs-contrib-media-sources.git#mse-mp2t-polyfill",
-    "videojs-swf": "5.0.0-rc0"
+    "videojs-swf": "5.0.0-rc1"
   }
 }

@@ -24,7 +24,7 @@ keyFailed = function(key) {
   return key.retries && key.retries >= 2;
 };
 
-videojs.Hls = videojs.extends(Component, {
+videojs.Hls = videojs.extend(Component, {
   constructor: function(tech, options) {
     var self = this, _player;
 

@@ -190,10 +190,10 @@ var
   },
 
   // a no-op MediaSource implementation to allow synchronous testing
-  MockMediaSource = videojs.extends(videojs.EventTarget, {
+  MockMediaSource = videojs.extend(videojs.EventTarget, {
     constructor: function() {},
     addSourceBuffer: function() {
-      return new (videojs.extends(videojs.EventTarget, {
+      return new (videojs.extend(videojs.EventTarget, {
         constructor: function() {},
         abort: function() {},
         buffered: videojs.createTimeRange(),