Add identity overrides and updated field to environment.json

Author: zachaysan

spec/sdk/fixtures/environment.json

@@ -66,5 +66,31 @@
       "segment_id": null,
       "enabled": true
     }
+  ],
+  "updated_at": "2023-07-14 16:12:00.000000",
+  "identity_overrides": [
+    {
+      "identifier": "overridden-id",
+      "identity_uuid": "0f21cde8-63c5-4e50-baca-87897fa6cd01",
+      "created_date": "2019-08-27T14:53:45.698555Z",
+      "updated_at": "2023-07-14 16:12:00.000000",
+      "environment_api_key": "B62qaMZNwfiqT76p38ggrQ",
+      "identity_features": [
+        {
+          "id": 1,
+          "feature": {
+            "id": 1,
+            "name": "some_feature",
+            "type": "STANDARD"
+          },
+          "featurestate_uuid": "1bddb9a5-7e59-42c6-9be9-625fa369749f",
+          "feature_state_value": "some-overridden-value",
+          "enabled": false,
+          "environment": 1,
+          "identity": null,
+          "feature_segment": null
+        }
+      ]
+    }
   ]
 }