bump json version

guh.pri

@@ -5,7 +5,7 @@ GUH_VERSION_STRING=$$system('dpkg-parsechangelog | sed -n -e "s/^Version: //p"')
 GUH_PLUGINS_PATH=/usr/lib/$$system('dpkg-architecture -q DEB_HOST_MULTIARCH')/guh/plugins/
 
 # define protocol versions
-JSON_PROTOCOL_VERSION=47
+JSON_PROTOCOL_VERSION=48
 REST_API_VERSION=1
 
 DEFINES += GUH_VERSION_STRING=\\\"$${GUH_VERSION_STRING}\\\" \

tests/auto/api.json

@@ -1,4 +1,4 @@
-47
+48
 {
     "methods": {
         "Actions.ExecuteAction": {
@@ -955,6 +955,9 @@
                 "$ref:EventType"
             ],
             "id": "Uuid",
+            "interfaces": [
+                "String"
+            ],
             "name": "String",
             "o:criticalStateTypeId": "Uuid",
             "o:primaryActionTypeId": "Uuid",