bump version

services/sync/modules/constants.js

@@ -41,7 +41,7 @@ const EXPORTED_SYMBOLS = ['WEAVE_VERSION', 'STORAGE_FORMAT_VERSION',
 			  'PERMS_FILE', 'PERMS_PASSFILE', 'PERMS_DIRECTORY',
 			  'ONE_BYTE', 'ONE_KILOBYTE', 'ONE_MEGABYTE'];
 
-const WEAVE_VERSION = "0.1.20";
+const WEAVE_VERSION = "0.1.21";
 const STORAGE_FORMAT_VERSION = 2;
 
 const PREFS_BRANCH = "extensions.weave.";