Update extension.json to conform with new extension-schema.json

Author: James McKinney

extension.json

@@ -1,6 +1,15 @@
 {
-  "name": "Enquiries",
-  "description": "The enquiries extension can be used to record questions raised during a contracting process, and the answers provided.",
-  "compatibility": ">=1.0.0",
-  "dependencies": [""]
+  "name": {
+    "en": "Enquiries"
+  },
+  "description": {
+    "en": "The enquiries extension can be used to record questions raised during a contracting process, and the answers provided."
+  },
+  "compatibility": [
+    "1.0",
+    "1.1"
+  ],
+  "documentationUrl": {
+    "en": "https://github.com/open-contracting/ocds_enquiry_extension"
+  }
 }