Updated Gradle runtime to version 2.13
Updated Gradle runtime to version 2.13

nextflow-io/nextflow,robsyme/nextflow,nextflow-io/nextflow,heuermh/nextflow,heuermh/nextflow,robsyme/nextflow,nextflow-io/nextflow,heuermh/nextflow,nextflow-io/nextflow,heuermh/nextflow,nextflow-io/nextflow,robsyme/nextflow,heuermh/nextflow,robsyme/nextflow,robsyme/nextflow