Updated json schmema

assets/schema.json

@@ -147,13 +147,19 @@
             "type": "string"
           },
           "endedAt": {
-            "type": ["string", "null"]
+            "type": [
+              "string",
+              "null"
+            ]
           },
           "gameId": {
             "type": "string"
           },
           "groupId": {
-            "type": ["string", "null"]
+            "type": [
+              "string",
+              "null"
+            ]
           },
           "playerIds": {
             "type": "array",
@@ -163,10 +169,13 @@
           },
           "scores": {
             "type": "object",
-            "items": {
-              "type": "array",
-              "items": {
-                "type": "string",
+            "additionalProperties": {
+              "oneOf": [
+                {
+                  "type": "null"
+                },
+                {
+                  "type": "object",
                   "properties": {
                     "roundNumber": {
                       "type": "number"
@@ -177,8 +186,11 @@
                     "change": {
                       "type": "number"
                     }
+                  },
+                  "required": ["roundNumber", "score", "change"],
+                  "additionalProperties": false
                 }
-              }
+              ]
             }
           },
           "notes": {