Update CHANGES.md

Gary Trakhman · gtrak · commit fc9647e0b1cb · 2022-05-31T11:07:33.000-04:00
diff --git a/CHANGES.md b/CHANGES.md
@@ -1,3 +1,8 @@
+## 2.1 (unreleased)
+### Breaking changes
+
+* pgx_lwt_mirage now requires conduit 2.3 instead of 2.2 (https://github.com/arenadotio/pgx/pull/117).
+
 ## 2.0 (2021-05-12)
 
 ### Breaking changes
