Add a C API for sets and frozensets.
diff --git a/Misc/NEWS b/Misc/NEWS
index 62e6656..e3fbbab 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -439,6 +439,8 @@
 C API
 -----
 
+- Added a C API for set and frozenset objects.
+
 - Removed PyRange_New().