Fix tests

spec/fixtures/api/schemas/public_api/v4/branch.json

@@ -5,6 +5,7 @@
     "commit",
     "merged",
     "protected",
+    "default",
     "developers_can_push",
     "developers_can_merge"
   ],
@@ -13,6 +14,7 @@
     "commit": { "$ref": "commit/basic.json" },
     "merged": { "type": "boolean" },
     "protected": { "type": "boolean" },
+    "default": { "type": "boolean" },
     "developers_can_push": { "type": "boolean" },
     "developers_can_merge": { "type": "boolean" },
     "can_push": { "type": "boolean" }