Return an object as the root element

Because otherwise it's impossible to change later

api/client-server/pusher.yaml

@@ -30,7 +30,8 @@ paths:
           description: The pushers for this user
           examples:
             application/json: |-
-              [
+              {
+                "pushers": [
                   {
                     "pushkey": "Xp/MzCt8/9DcSNE9cuiaoT5Ac55job3TdLSSmtmYl4A=",
                     "kind": "http",
@@ -44,9 +45,15 @@ paths:
                     }
                   }
                 ]
+              }
           schema:
+            type: object
+            properties:
+              pushers:
                 type: array
                 title: Pushers
+                description: |-
+                  An array containing the current pushers for the user
                 items:
                   type: object
                   title: Pusher