Bump gmavenplus-plugin from 1.12.1 to 1.13.0

Bumps [gmavenplus-plugin](https://github.com/groovy/GMavenPlus) from 1.12.1 to 1.13.0.
- [Release notes](https://github.com/groovy/GMavenPlus/releases)
- [Commits](https://github.com/groovy/GMavenPlus/compare/1.12.1...1.13.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 85f3fcb..4d16a49 100644
--- a/pom.xml
+++ b/pom.xml
@@ -667,7 +667,7 @@
                 <plugin>
                     <groupId>org.codehaus.gmavenplus</groupId>
                     <artifactId>gmavenplus-plugin</artifactId>
-                    <version>1.12.1</version>
+                    <version>1.13.0</version>
                     <dependencies>
                         <dependency>
                             <groupId>org.codehaus.groovy</groupId>