delivery-pipeline-plugin-1.1.0

Upgrade minimum required Java version to Java 8
Upgrade required dependency on Jenkins Pipeline plugin (workflow-aggregator) from 2.0 to 2.4
Addressed various static code analysis warnings
JENKINS-45738 Allow task pipeline steps to take closures for improved visualization
JENKINS-47529 Allow multiple pipelines to be configured for Jenkins pipelines based view

Release artifacts: https://repo.jenkins-ci.org/releases/se/diabol/jenkins/pipeline/delivery-pipeline-plugin/1.1.0/