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](groovy/GMavenPlus@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>

mybatis-spring-boot-samples/mybatis-spring-boot-sample-groovy/pom.xml

@@ -76,7 +76,7 @@
       <plugin>
         <groupId>org.codehaus.gmavenplus</groupId>
         <artifactId>gmavenplus-plugin</artifactId>
-        <version>1.12.1</version>
+        <version>1.13.0</version>
         <executions>
           <execution>
             <goals>