add minProperties=1

Co-authored-by: Flo Edelmann <git@flo-edelmann.de>

Author: k-yle

schemas/discarded.json

@@ -7,7 +7,11 @@
     "additionalProperties": {
       "anyOf": [
         { "type": "boolean", "enum": [true] },
-        { "type": "object", "additionalProperties": { "type": "boolean", "enum": [true] } }
+        {
+          "type": "object",
+          "additionalProperties": { "type": "boolean", "enum": [true] },
+          "minProperties": 1
+        }
       ]
     }
 }