Version bump 0.12.4
Version bump 0.12.4

sinangedik/jenkins_pipeline_builder,constantcontact/jenkins_pipeline_builder,dtyler/jenkins_pipeline_builder,sinangedik/jenkins_pipeline_builder,crimsonknave/jenkins_pipeline_builder,crimsonknave/jenkins_pipeline_builder,dtyler/jenkins_pipeline_builder,constantcontact/jenkins_pipeline_builder