Modified bzip2 library export to use ES6 syntax. Fixes #382.

src/core/vendor/bzip2.js

@@ -262,4 +262,4 @@ bzip2.decompress = function(bits, size, len){
   return output;
 }
 
-module.exports = bzip2;
+export default bzip2;

src/web/BackgroundWorkerWaiter.mjs

@@ -67,6 +67,7 @@ class BackgroundWorkerWaiter {
                 log.debug("Background ChefWorker loaded");
                 break;
             case "optionUpdate":
+            case "statusMessage":
                 // Ignore these messages
                 break;
             default: