updating service worker

Author: aarongustafson

1st-edition/read/sw.js

@@ -3,7 +3,7 @@
 /* A version number is useful when updating the worker logic,
    allowing you to remove outdated cache entries during the update.
 */
-var version = 'v1::';
+var version = 'v2::';
 
 /* These resources will be downloaded and cached by the service worker
    during the installation process. If any resource fails to be downloaded,