Add CHANGES to MANIFEST

diff --git a/MANIFEST b/MANIFEST
index 39bde06..b4d7225 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -18,3 +18,4 @@ t/once.t
 t/array.t
 LICENSE
 lib/Hash/MostUtils/leach/v5_10.pm
+CHANGES