Bump org.codehaus.gmavenplus:gmavenplus-plugin from 1.4 to 4.2.1

Bumps [org.codehaus.gmavenplus:gmavenplus-plugin](https://github.com/groovy/GMavenPlus) from 1.4 to 4.2.1.
- [Release notes](https://github.com/groovy/GMavenPlus/releases)
- [Commits](groovy/GMavenPlus@1.4...4.2.1)

---
updated-dependencies:
- dependency-name: org.codehaus.gmavenplus:gmavenplus-plugin
  dependency-version: 4.2.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -35,7 +35,7 @@
         <autoVersionSubmodules>true</autoVersionSubmodules>
         <jmh.version>1.11.2</jmh.version>
         <maven-release-plugin.version>2.5.2</maven-release-plugin.version>
-        <gmavenplus-plugin.version>1.4</gmavenplus-plugin.version>
+        <gmavenplus-plugin.version>4.2.1</gmavenplus-plugin.version>
         <spock-global-unroll.version>0.5.1</spock-global-unroll.version>
     </properties>