update angular-resource module

Author: Raffaele Bua

client/webclient/src/main/frontend/bower.json

@@ -8,7 +8,7 @@
     "angular-bootstrap": "*",
     "angular-cookies": "^1.3.0",
     "angular-messages": "^1.3.0",
-    "angular-resource": "^1.3.0",
+    "angular-resource": "1.3.20",
     "angular-route": "^1.3.0",
     "angular-sanitize": "^1.3.0",
     "angular-touch": "^1.3.0",