Bump version for dev

Author: evant

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
 ## [0.27.0] 2023-09-13
 
 ### Changed

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-assertk = "0.27.0"
+assertk = "0.28.0-SNAPSHOT"
 kotlin = "1.9.0"
 kotlinx-coroutines = "1.7.0"
 [libraries]