GROOVY-9446: Bump japicmp-gradle-plugin to 0.2.9
GROOVY-9446: Bump japicmp-gradle-plugin to 0.2.9

shils/incubator-groovy,apache/groovy,shils/groovy,paulk-asert/incubator-groovy,shils/incubator-groovy,paulk-asert/groovy,shils/incubator-groovy,shils/groovy,shils/groovy,paulk-asert/incubator-groovy,paulk-asert/incubator-groovy,paulk-asert/groovy,apache/incubator-groovy,paulk-asert/incubator-groovy,apache/incubator-groovy,paulk-asert/incubator-groovy,apache/groovy,apache/groovy,shils/groovy,paulk-asert/groovy,paulk-asert/groovy,shils/incubator-groovy,apache/groovy,apache/incubator-groovy,apache/incubator-groovy