Sentry events schema update (#333)

* Make user/id nullable

* fixing schema

Author: jonwihl

Diff for: airbyte-integrations/connectors/source-sentry/streams/events.patch.json

@@ -1,6 +1,5 @@
 {
     "properties":{
-        "type": "object",
         "user":{
             "type": ["object", "null"],
             "properties":{