Add pending changelog noting possible backwards compat panic

diff --git a/pending_changelog/2059.txt b/pending_changelog/2059.txt
new file mode 100644 (file)
index 0000000..d2ee0bc
--- /dev/null
+++ b/pending_changelog/2059.txt
@@ -0,0 +1,4 @@
+## Backwards Compatibility
+
+- Providing `ChannelMonitorUpdate`s generated by LDK 0.0.115 to a
+`ChannelMonitor` on 0.0.114 or before may panic.