[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare for next development iteration

jhalterman/concurrentunit,advanced-programs/concurrentunit,MichaelJY91/concurrentunit,yodasantu/concurrentunit,yodasantu/concurrentunit,jhalterman/concurrentunit,MichaelJY91/concurrentunit,flowersinthesand/concurrentunit,advanced-programs/concurrentunit,flowersinthesand/concurrentunit