Release version 0.3.1

Author: oxzi

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [0.3.1] - 2021-10-04
 ### Added
 - pimod.sh -t: trace executed commands for debugging.
 - Started a CHANGELOG.md with prior changes.
@@ -53,7 +55,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Initial release of a working version of pimod.
 
-[Unreleased]: https://github.com/Nature40/pimod/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/Nature40/pimod/compare/v0.3.1...HEAD
+[0.3.1]: https://github.com/Nature40/pimod/compare/v0.3.0...v0.3.1
 [0.3.0]: https://github.com/Nature40/pimod/compare/v0.2.2...v0.3.0
 [0.2.2]: https://github.com/Nature40/pimod/compare/v0.2.1...v0.2.2
 [0.2.1]: https://github.com/Nature40/pimod/compare/v0.2...v0.2.1