Bump org.codehaus.gmavenplus:gmavenplus-plugin from 1.5 to 4.0.1

Bumps [org.codehaus.gmavenplus:gmavenplus-plugin](https://github.com/groovy/GMavenPlus) from 1.5 to 4.0.1.
- [Release notes](https://github.com/groovy/GMavenPlus/releases)
- [Commits](groovy/GMavenPlus@1.5...4.0.1)

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

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

pom.xml

@@ -120,7 +120,7 @@
     <org.easymock.version>3.2</org.easymock.version>
     <junit.version>4.13.2</junit.version>
     <eclipse.plugin.version>1.0.0</eclipse.plugin.version>
-    <gmavenplus.version>1.5</gmavenplus.version>
+    <gmavenplus.version>4.0.1</gmavenplus.version>
     <groovy.version>2.4.15</groovy.version>
     <jdocbook.plugin.version>2.3.10</jdocbook.plugin.version>
     <jdocbook.style.version>1.1.1</jdocbook.style.version>