Update CHANGELOG.rst

Author: sbillinge

CHANGELOG.rst

@@ -4,6 +4,30 @@ Release Notes
 
 .. current developments
 
+3.2.0rc0
+========
+
+**Changed:**
+
+* Removed support for Python 2
+* This version only supporting Python 3.10, 3.11, 3.12
+* All docstrings style updated to numpydoc
+
+**Deprecated:**
+
+* Deprecated the `diffpy.structure.applications` module. Use
+  `diffpy.structure.apps` instead
+
+**Removed:**
+
+* Removed all `six` compatibility code
+
+**Fixed:**
+
+* Repo structure modified to the new diffpy standard
+
+
+
 Version 3.1.0 - 2022-12-04
 --------------------------