REL: Begin next release cycle

CHANGELOG.md

@@ -4,6 +4,22 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+
+### Changed (for changes in existing functionality)
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+### Documentation
+
 ## [0.9.0] - 2022-11-02
 (Florian Spreckelsen)
 

src/doc/conf.py

@@ -26,9 +26,9 @@ copyright = '2022, IndiScale GmbH'
 author = 'Daniel Hornung'
 
 # The short X.Y version
-version = '0.9.0'
+version = '0.9.1'
 # The full version, including alpha/beta/rc tags
-release = '0.9.0'
+release = '0.9.1-SNAPSHOT'
 
 
 # -- General configuration ---------------------------------------------------