add pull number

Author: malexmad

tap_github/repository_streams.py

@@ -1574,6 +1574,7 @@ def parse_response(self, response: requests.Response) -> Iterable[dict]:
         th.Property("repo", th.StringType),
         th.Property("org", th.StringType),
         th.Property("repo_id", th.IntegerType),
+        th.Property("pull_number", th.IntegerType),
         # Event Keys
         th.Property("id", th.IntegerType),
         th.Property("node_id", th.StringType),