Fix JSON schema to issues in issue board lists

spec/fixtures/api/schemas/issue.json

@@ -10,23 +10,31 @@
     "title": { "type": "string" },
     "confidential": { "type": "boolean" },
     "labels": {
-      "type": ["array"],
-      "required": [
-        "id",
-        "color",
-        "description",
-        "title",
-        "priority"
-      ],
-      "properties": {
-        "id": { "type": "integer" },
-        "color": {
-          "type": "string",
-          "pattern": "^#[0-9A-Fa-f]{3}{1,2}+$"
+      "type": "array",
+      "items": {
+        "type": "object",
+        "required": [
+          "id",
+          "color",
+          "description",
+          "title",
+          "priority"
+        ],
+        "properties": {
+          "id": { "type": "integer" },
+          "color": {
+            "type": "string",
+            "pattern": "^#[0-9A-Fa-f]{3}{1,2}+$"
+          },
+          "description": { "type": ["string", "null"] },
+          "text_color": {
+            "type": "string",
+            "pattern": "^#[0-9A-Fa-f]{3}{1,2}+$"
+          },
+          "title": { "type": "string" },
+          "priority": { "type": ["integer", "null"] }
         },
-        "description": { "type": ["string", "null"] },
-        "title": { "type": "string" },
-        "priority": { "type": ["integer", "null"] }
+        "additionalProperties": false
       }
     },
     "assignee": {