Changed Node-JS-capabilities based on the readme

Every item in the list seems to be implemented:
https://github.com/auth0/node-jsonwebtoken#jwtsignpayload-secretorprivatekey-options-callback

Author: JacoKoster

views/website/libraries/2-Node.js.json

@@ -9,13 +9,13 @@
       "support": {
         "sign": true,
         "verify": true,
-        "iss": false,
-        "sub": false,
+        "iss": true,
+        "sub": true,
         "aud": true,
         "exp": true,
-        "nbf": false,
-        "iat": false,
-        "jti": false,
+        "nbf": true,
+        "iat": true,
+        "jti": true,
         "hs256": true,
         "hs384": true,
         "hs512": true,
@@ -33,4 +33,4 @@
       "installCommandHtml": "npm install jsonwebtoken"
     }
   ]
-}
+}