add changelog

cherylEnkidu · cherylEnkidu · commit ca1926bf14a6 · 2025-07-03T18:10:42.000-04:00
diff --git a/Firestore/CHANGELOG.md b/Firestore/CHANGELOG.md
@@ -1,3 +1,6 @@
+# Unreleased
+- [changed] Drop C++14 support, Firestore SDK now requires at least C++17.
+- 
 # 11.12.0
 - [fixed] Fixed the `null` value handling in `isNotEqualTo` and `notIn` filters.
 
