chore: prepare for next development iteration

Author: CarstenWickner

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](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
 ## [4.0.0]
 - No changes, just bumping of major version to indicate compatibility with `jsonschema-generator` version 4.*
 
@@ -38,6 +40,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Indicate a number's "maximum" (inclusive) according to `@Max`, `@DecimalMax` or `@NegativeOrZero`
 - Indicate a number's "exclusiveMaximum" according to `@DecimalMax` or `@Negative`
 
+[Unreleased]: https://github.com/victools/jsonschema-module-javax-validation/compare/v4.0.0...HEAD
 [4.0.0]: https://github.com/victools/jsonschema-module-javax-validation/compare/v3.2.0...v4.0.0
 [3.2.0]: https://github.com/victools/jsonschema-module-javax-validation/compare/v3.0.0...v3.2.0
 [3.0.0]: https://github.com/victools/jsonschema-module-javax-validation/compare/v1.0.0...v3.0.0

pom.xml

@@ -8,7 +8,7 @@
 
     <groupId>com.github.victools</groupId>
     <artifactId>jsonschema-module-javax-validation</artifactId>
-    <version>4.0.0</version>
+    <version>4.0.1-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <licenses>
@@ -27,7 +27,7 @@
         <connection>scm:git:ssh://github.com/victools/jsonschema-module-javax-validation.git</connection>
         <developerConnection>scm:git:ssh://git@github.com/victools/jsonschema-module-javax-validation.git</developerConnection>
         <url>https://github.com/victools/jsonschema-module-javax-validation</url>
-        <tag>v4.0.0</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <organization>