[maven-release-plugin] prepare release jline-2.12.1
[maven-release-plugin] prepare release jline-2.12.1

tkruse/jline2,kaulkie/jline2,fantasy86/jline2,ctubbsii/jline2,scala/scala-jline,renew-tgi/jline2,scala/scala-jline,DALDEI/jline2,msaxena2/jline2