Bump groovy-all from 2.4.12 to 2.4.20
Bump groovy-all from 2.4.12 to 2.4.20

Bumps [groovy-all](https://github.com/apache/groovy) from 2.4.12 to 2.4.20.
- [Release notes](https://github.com/apache/groovy/releases)
- [Commits](https://github.com/apache/groovy/commits)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
netceler/pipeline-maven-plugin,jenkinsci/pipeline-maven-plugin,netceler/pipeline-maven-plugin,jenkinsci/pipeline-maven-plugin