kiji-music: [maven-release-plugin] prepare for next development iteration

commit: https://github.com/kijiproject/kiji-music/commit/05d198be7df9678d5e5d64902130548d9957a0f2
kiji-music: [maven-release-plugin] prepare release kiji-music-1.1.6

commit: https://github.com/kijiproject/kiji-music/commit/d2e57f4edd8b5cdf1d3eb4dc15105d46e9de6a2b