fix(package): update express-jwt-authz to version 2.3.0

Closes #338

Author: greenkeeper[bot]

package.json

@@ -20,7 +20,7 @@
     "cookie-parser": "^1.4.3",
     "express": "^4.14.0",
     "express-jwt": "^5.1.0",
-    "express-jwt-authz": "^1.0.0",
+    "express-jwt-authz": "^2.3.0",
     "express-session": "^1.15.1",
     "flux": "*",
     "globals": "11.4.0",