Prepare 0.10
Changelog
=========
+Version 0.10 (unreleased)
+------------------------
+
+**Highlights of this release**
+
+* ...
+
+**Acknowledgments**
+
+Thanks to everyone who contributed to this release!
+People with a "+" by their names contributed a patch for the first time.
+
+* ...
+
+
Version 0.9 (2021-01-23)
------------------------
