update cdn ling version

update from .12 to .13

Author: pubnubcraig

README.md

@@ -5,11 +5,11 @@ PubNub for JS Docs have been moved to: http://www.pubnub.com/docs/javascript/jav
 ### CDN Links
 
 #### HTTP
-* http://cdn.pubnub.com/pubnub-3.7.12.min.js
-* http://cdn.pubnub.com/pubnub-3.7.12.js
+* http://cdn.pubnub.com/pubnub-3.7.13.min.js
+* http://cdn.pubnub.com/pubnub-3.7.13.js
 
 #### HTTPS
-* https://cdn.pubnub.com/pubnub-3.7.12.min.js
-* https://cdn.pubnub.com/pubnub-3.7.12.js
+* https://cdn.pubnub.com/pubnub-3.7.13.min.js
+* https://cdn.pubnub.com/pubnub-3.7.13.js
 
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