update to jwcrypto 0.2.1 which fixes IE specific javascript syntax errors

package.json

@@ -18,7 +18,7 @@
         "express": "2.5.0",
         "iconv": "1.1.3",
         "mustache": "0.3.1-dev",
-        "jwcrypto": "0.2.0",
+        "jwcrypto": "0.2.1",
         "mysql": "0.9.5",
         "node-gettext": "0.1.1",
         "node-statsd": "https://github.com/downloads/lloyd/node-statsd/0509f85.tgz",