update changelog

CHANGELOG.md

@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.3.1] - 2021-07-24
+
+### Fixed
+- Custom webpack function was not being called when running in isServer, @fattomhk, PR #11
 
 ## [0.3.0] - 2021-06-30
 
@@ -55,8 +59,9 @@ First kind of functional version of the package and it also has the ability to h
 - Initial File
 - Docs and such
 
-[Unreleased]: https://github.com/reecem/prismic-sitemap/compare/v0.3.0...HEAD
-[0.3.0]: https://github.com/reecem/prismic-sitemap/compare/v0.3.0...HEAD
+[Unreleased]: https://github.com/reecem/prismic-sitemap/compare/v0.3.1...HEAD
+[0.3.1]: https://github.com/reecem/prismic-sitemap/compare/v0.3.1...HEAD
+[0.3.0]: https://github.com/reecem/prismic-sitemap/compare/v0.3.0...v0.3.1
 [0.2.0]: https://github.com/reecem/prismic-sitemap/compare/v0.2.0
 [0.1.1]: https://github.com/reecem/prismic-sitemap/tag/v0.1.0
 [0.1.0]: https://github.com/reecem/prismic-sitemap/tag/v0.1.0