Adds blockUnmockedRequests property of mock response plugin configuration schema

Author: bartizan

schemas/v0.27.0/mockresponseplugin.schema.json

@@ -10,6 +10,10 @@
     "mocksFile": {
       "type": "string",
       "description": "Path to the file containing the mock responses."
+    },
+    "blockUnmockedRequests": {
+      "type": "boolean",
+      "description": "Set to true to return 502 Bad Gateway response for requests that aren't mocked. Default is false."
     }
   },
   "required": [