FIX package.json version (#657)

Author: fgalan

package.json

@@ -2,7 +2,7 @@
   "name": "iotagent-json",
   "license": "AGPL-3.0-only",
   "description": "IoT Agent for the JSON protocol",
-  "version": "1.21.0",
+  "version": "1.22.0",
   "homepage": "https://github.com/telefonicaid/iotagent-json",
   "author": {
     "name": "Daniel Moran",