update changelog

Author: sbillinge

CHANGELOG.rst

@@ -3,3 +3,17 @@ Release notes
 =============
 
 .. current developments
+
+1.0.0
+=====
+
+**Added:**
+
+* Use scikit-package to add a preliminary documentation to srxconfutils.
+* Add python 3.14 support
+
+**Fixed:**
+
+* Support scikit-package Level 5 standard (https://scikit-package.github.io/scikit-package/).
+* Port legacy Python 2 code to support Python 3.
+