update changelog

Author: sbillinge

CHANGELOG.rst

@@ -3,3 +3,12 @@ Release notes
 =============
 
 .. current developments
+
+1.0.0
+=====
+
+**Changed:**
+
+* Updated from Python 2.6-2.7 to Python 3.11-3.13
+* Support ``scikit-package`` Level 5 standard (https://scikit-package.github.io/scikit-package/).
+